Relevant bibliographies by topics / Morrison-Formation

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Academic literature on the topic 'Morrison-Formation'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Morrison-Formation"

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Turner, Christine, and Fred Peterson. "Morrison Ecosystem Project." UW National Parks Service Research Station Annual Reports 18 (January 1, 1994): 152–55. http://dx.doi.org/10.13001/uwnpsrc.1994.3219.

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The Late Jurassic Morrison Formation is one of science's best windows into the world of dinosaurs and Mesozoic ecosystems. The Morrison Formation has significant exposures in many units within the Rocky Mountain Region of the National Park Service. These include Arches National Park (ARCH), Bighorn National Recreation Area (BIRO), Black Canyon of the Gunnison National Monument (BLCA), Capitol Reef National Park (CARE), Colorado National Monument (COLO), Curecanti National Recreation Area (CURE), Dinosaur National Monument (DINO), Glacier National Park (GLAC), Glen Canyon National Recreation Area (GLCA), Hovenweep National Monument (HOVE), and Yellowstone National Park (YELL). The Morrison Formation Extinct Ecosystems Project, hereafter called the Morrison Project, began on June 1 of 1994. The project is a multidisciplinary endeavor to determine the nature, distribution, and evolution of the ancient ecosystems that existed in the Western Interior of the United States during the Late Jurassic Epoch when the Morrison Formation and related rocks were deposited. The information obtained from the research can be used to suggest appropriate resource management actions and the project will also provide an improved understanding of the geological and paleontological history of these NPS units and better information for interpretive programs and publications.
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Lucas, Spencer. "The Upper Jurassic Morrison Formation in north-central New Mexico–Linking Colorado Plateau stratigraphy to the stratigraphy of the High Plains." Geology of the Intermountain West 5 (June 21, 2018): 117–29. http://dx.doi.org/10.31711/giw.v5.pp117-129.

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Most study of the Upper Jurassic Morrison Formation has focused on its spectacular and extensive outcrops on the southern Colorado Plateau. Nevertheless, outcrops of the Morrison Formation extend far off the Colorado Plateau, onto the southern High Plains as far east as western Oklahoma. Outcrops of the Morrison Formation east of and along the eastern flank of the Rio Grande rift in north-central New Mexico (Sandoval, Bernalillo, and San­ta Fe Counties) are geographically intermediate between the Morrison Formation outcrops on the southeastern Colorado Plateau in northwestern New Mexico and on the southern High Plains of eastern New Mexico. Previous lithostratigraphic correlations between the Colorado Plateau and High Plains Morrison Formation outcrops using the north-central New Mexico sections encompassed a geographic gap in outcrop data of about 100 km. New data on previously unstudied Morrison Formation outcrops at Placitas in Sandoval County and south of Lamy in Santa Fe County reduce that gap and significantly add to stratigraphic coverage. At Placitas, the Morrison Formation is about 141 m thick, in the Lamy area it is about 232 m thick, and, at both locations, it consists of the (ascending) sandstone-dominated Salt Wash Member, mudstone-dominated Brushy Basin Member, and sandstone-dominat­ed Jackpile Member. Correlation of Morrison strata across northern New Mexico documents the continuity of the Morrison depositional systems from the Colorado Plateau eastward onto the southern High Plains. Along this transect, there is significant stratigraphic relief on the base of the Salt Wash Member (J-5 unconformity), the base of the Jackpile Member, and the base of the Cretaceous strata that overlie the Morrison Formation (K unconfor­mity). Salt Wash Member deposition was generally by easterly-flowing rivers, and this river system continued well east of the Colorado Plateau. The continuity of the Brushy Basin Member, and its characteristic zeolite-rich clay facies, onto the High Plains suggests that localized depositional models (e.g., “Lake T’oo’dichi’) need to be re-eval­uated. Instead, envisioning Brushy Basin Member deposition on a vast muddy floodplain, with some localized lacustrine and palustrine depocenters, better interprets its distribution and facies.
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Lucas, Spencer G. "The Upper Jurassic Morrison Formation in north-central New Mexico–Linking Colorado Plateau stratigraphy to the stratigraphy of the High Plains." Geology of the Intermountain West 5 (June 1, 2018): 117–29. http://dx.doi.org/10.31711/giw.v5i0.23.

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Most study of the Upper Jurassic Morrison Formation has focused on its spectacular and extensive outcrops on the southern Colorado Plateau. Nevertheless, outcrops of the Morrison Formation extend far off the Colorado Plateau, onto the southern High Plains as far east as western Oklahoma. Outcrops of the Morrison Formation east of and along the eastern flank of the Rio Grande rift in north-central New Mexico (Sandoval, Bernalillo, and San­ta Fe Counties) are geographically intermediate between the Morrison Formation outcrops on the southeastern Colorado Plateau in northwestern New Mexico and on the southern High Plains of eastern New Mexico. Previous lithostratigraphic correlations between the Colorado Plateau and High Plains Morrison Formation outcrops using the north-central New Mexico sections encompassed a geographic gap in outcrop data of about 100 km. New data on previously unstudied Morrison Formation outcrops at Placitas in Sandoval County and south of Lamy in Santa Fe County reduce that gap and significantly add to stratigraphic coverage. At Placitas, the Morrison Formation is about 141 m thick, in the Lamy area it is about 232 m thick, and, at both locations, it consists of the (ascending) sandstone-dominated Salt Wash Member, mudstone-dominated Brushy Basin Member, and sandstone-dominat­ed Jackpile Member. Correlation of Morrison strata across northern New Mexico documents the continuity of the Morrison depositional systems from the Colorado Plateau eastward onto the southern High Plains. Along this transect, there is significant stratigraphic relief on the base of the Salt Wash Member (J-5 unconformity), the base of the Jackpile Member, and the base of the Cretaceous strata that overlie the Morrison Formation (K unconfor­mity). Salt Wash Member deposition was generally by easterly-flowing rivers, and this river system continued well east of the Colorado Plateau. The continuity of the Brushy Basin Member, and its characteristic zeolite-rich clay facies, onto the High Plains suggests that localized depositional models (e.g., “Lake T’oo’dichi’) need to be re-eval­uated. Instead, envisioning Brushy Basin Member deposition on a vast muddy floodplain, with some localized lacustrine and palustrine depocenters, better interprets its distribution and facies.
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Turner, Christine, Fred Peterson, D. Chure, T. Demko, and G. Engelmann. "The Morrison Formation Extinct Ecosystems Project." UW National Parks Service Research Station Annual Reports 19 (January 1, 1995): 84–91. http://dx.doi.org/10.13001/uwnpsrc.1995.3257.

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The Morrison Extinct Ecosystem project is generating interesting results that, although preliminary in nature, are starting to converge on an integrated reconstruction of the Late Jurassic habitat in the Western Interior of the United States. A workshop in April, 1996, helped the participants learn where their data are in agreement and where remaining inconsistencies in the data exist. The workshop thus helped focus collective and individual efforts for the remaining field season so that additional field research and sample collection could be directed toward addressing the unresolved questions. A much more complete picture of the Morrison ecosystem is emerging, with such lines of evidence as the isotopic data confirming regional tectonic interpretations, and trace fossils adding subtle but significant clues to the interpretations of the ancient climate and water-table position and fluctuations. A mesic climate interpretation with a moderate amount of available moisture is derived from some of the plant fossils and, at first glance, contrasts with evidence of an arid to semi-arid climate based on the presence of saline, alkaline lake deposits; eolian strata; and evaporite deposits. Thus, the climate may have changed periodically or episodically, leaving evidence in the geologic record of the contrasting climate regimes-not all of which existed at the same time. A possible resolution of these discrepancies is that there was marked seasonality in which part of the year was relatively dry, as reflected by the arid to semiarid environmental indicators, whereas there may have been more precipitation during other parts of the year, as reflected by the more mesic environmental indicators. An additional factor that will need to be evaluated further is the role of the water table. The trace fossils suggest a fairly shallow water table that many of the plants, especially the larger ones, could tap throughout the year and therefore not be unduly affected by seasonal dryness. Also to be evaluated is the possibility that plants grew near stream courses or in overbank ponds in areas having a high water table, and that areas away from the streams were drier. These issues will be the focus of the remaining work, as outlined at the conclusion of the workshop.
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Turner, Christine, Fred Peterson, D. Chure, T. Demko, and G. Engelmann. "The Morrison Formation Extinct Ecosystems Project." UW National Parks Service Research Station Annual Reports 20 (January 1, 1996): 20–27. http://dx.doi.org/10.13001/uwnpsrc.1996.3269.

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The Morrison Project is a multidisciplinary effort to interpret the ancient ecosystem that was present in the Western Interior of the United States during deposition of the Upper Jurassic Morrison Formation. The project began in June of 1994 and the first two years of research (1994-95, 1995-96) were devoted primarily to identifying problems and gathering information that would form the basis for later interpretations. Efforts during the final year (1996-97) were directed toward resolving remaining problems or conflicting findings and synthesizing the various research endeavors into a reconstruction of the Late Jurassic ecosystem.
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Davis, Brian, Richard Cifelli, and Guillermo Rougier. "A preliminary report of the fossil mammals from a new microvertebrate locality in the Upper Jurassic Morrison Formation, Grand County, Utah." Geology of the Intermountain West 5 (February 7, 2018): 1–8. http://dx.doi.org/10.31711/giw.v5.pp1-8.

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The first Mesozoic mammals in North America were discovered in the Morrison Formation during the closing decades of the 19th century, as by-products of dinosaurs quarried by teams led by O.C. Marsh. These tiny fossils served as foundational specimens for our understanding of Mesozoic mammal evolution. There are now nearly 25 mammal-bearing localities known from the Morrison Formation, distributed across the Western Interior from the Black Hills to southern Colorado and west into Utah; the most historically important of these are in Wyoming (e.g., Como Quarry 9). Most Morrison mammals are known by jaws or jaw fragments, and several important Mesozoic groups (e.g., docodonts, dryolestoids, and to a large extent triconodonts and symmetrodonts) were established based on Morrison material, shaping the perception of mammalian diversity on a global scale. Despite heavy sampling of coeval sites elsewhere, the Morrison remains the most systematically diverse (at high taxonomic levels) assemblage of Jurassic mammals in the world. Here, we describe two mammalian specimens and highlight other remains yet to be fully identified from a new microvertebrate locality in the Morrison Formation of eastern Grand County, Utah. The site is positioned low in the Brushy Basin Member and is similar in lithology and stratigraphic level to the famous small vertebrate localities of the Fruita Paleontological Area, located less than 50 km to the northeast. In addition to small archosaurs and squamates, limited excavation to date has yielded at least 20 mammalian specimens representing a minimum of six taxa, several of which are new and quite different from typical Morrison taxa. Preservation is generally excellent and includes partially articulated cranial and postcranial elements of small vertebrates. This new site has great potential to contribute new taxa and more complete morphological data than typical Morrison localities, underscoring the importance of continued field work in the Morrison.
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Davis, Brian M., Richard L. Cifelli, and Guillermo W. Rougier. "A preliminary report of the fossil mammals from a new microvertebrate locality in the Upper Jurassic Morrison Formation, Grand County, Utah." Geology of the Intermountain West 5 (June 1, 2018): 1–8. http://dx.doi.org/10.31711/giw.v5i0.17.

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The first Mesozoic mammals in North America were discovered in the Morrison Formation during the closing decades of the 19th century, as by-products of dinosaurs quarried by teams led by O.C. Marsh. These tiny fossils served as foundational specimens for our understanding of Mesozoic mammal evolution. There are now nearly 25 mammal-bearing localities known from the Morrison Formation, distributed across the Western Interior from the Black Hills to southern Colorado and west into Utah; the most historically important of these are in Wyoming (e.g., Como Quarry 9). Most Morrison mammals are known by jaws or jaw fragments, and several important Mesozoic groups (e.g., docodonts, dryolestoids, and to a large extent triconodonts and symmetrodonts) were established based on Morrison material, shaping the perception of mammalian diversity on a global scale. Despite heavy sampling of coeval sites elsewhere, the Morrison remains the most systematically diverse (at high taxonomic levels) assemblage of Jurassic mammals in the world. Here, we describe two mammalian specimens and highlight other remains yet to be fully identified from a new microvertebrate locality in the Morrison Formation of eastern Grand County, Utah. The site is positioned low in the Brushy Basin Member and is similar in lithology and stratigraphic level to the famous small vertebrate localities of the Fruita Paleontological Area, located less than 50 km to the northeast. In addition to small archosaurs and squamates, limited excavation to date has yielded at least 20 mammalian specimens representing a minimum of six taxa, several of which are new and quite different from typical Morrison taxa. Preservation is generally excellent and includes partially articulated cranial and postcranial elements of small vertebrates. This new site has great potential to contribute new taxa and more complete morphological data than typical Morrison localities, underscoring the importance of continued field work in the Morrison.
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Engelmann, George. "Paleontological Survey of the Jurassic Morrison Formation in Dinosaur National Monument." UW National Parks Service Research Station Annual Reports 15 (January 1, 1991): 83–84. http://dx.doi.org/10.13001/uwnpsrc.1991.2975.

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This project was undertaken to survey the surface exposures of the Jurassic Morrison Formation within Dinosaur National Monument (DNM) for fossil occurrences of any sort. The primary purpose of this survey is to provide an assessment of the extent and characteristics of the paleontological resource in this geologic formation within DNM. In so doing, the survey may also have the effect of discovering specimens of obvious and immediate scientific importance and providing observations that will contribute to an improved understanding of the stratigraphy of the Morrison Formation. Dinosaur National Monument was originally established for, and takes its name from the unique occurrence of a quarry (the Carnegie Quarry (CQ) that has produced a diverse and abundant dinosaur fauna. The CQ occurs within the Morrison Formation which is known worldwide as one of the most prolific dinosaur-bearing units in the paleontologic record (Colbert. 1968). In addition to the dinosaurs, the Morrison has produced the best represented fauna of early mammals from the Jurassic (Clemens et al. 1979) and fossils of other vertebrates (Chure & Engelmann 1989). This suggests that the area beyond the CQ at DNM may contain important paleontological resources. This project will provide the first systematic survey of the Morrison Formation within DNM. It will provide a basis for management of the paleontologic resource in the future and is likely to yield immediate results in the discovery of specimens that can be important to ongoing research projects.
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Göhlich, Ursula B., Luis M. Chiappe, James M. Clark, and Hans-Dieter Sues. "The systematic position of the Late Jurassic alleged dinosaur Macelognathus (Crocodylomorpha: Sphenosuchia)." Canadian Journal of Earth Sciences 42, no. 3 (March 1, 2005): 307–21. http://dx.doi.org/10.1139/e05-005.

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Macelognathus vagans was described by O.C. Marsh in 1884, based on a mandibular symphysis from the Upper Jurassic Morrison Formation of Wyoming. Often considered a dinosaur but later tentatively referred to the Crocodylia, its phylogenetic identity has until now been enigmatic. New material of this species from the Morrison Formation of western Colorado demonstrates its affinities with basal crocodylomorphs commonly grouped together as the Sphenosuchia, which are characterized by a gracile postcranial skeleton with erect limb posture. Macelognathus shares features with Kayentasuchus from the Lower Jurassic Kayenta Formation of Arizona and Hallopus, which may be from the Morrison Formation of eastern Colorado. The new material constitutes the youngest definitive occurrence of a sphenosuchian, previously known from the Late Triassic to the Middle or Late? Jurassic.
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Woodruff, D. "What factors influence our reconstructions of Morrison Formation sauropod diversity?" Geology of the Intermountain West 6 (December 19, 2019): 93–112. http://dx.doi.org/10.31711/giw.v6.pp93-112.

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The Upper Jurassic Morrison Formation classically represents the “Golden Age” of sauropods, and the Morrison Formation is reported to have yielded 13 genera and 24 species of sauropods. This incredible diversity has produced numerous theories attempting to reconcile the co-occurrence of such large, and similar taxa. Previously, a comparably high diversity has been proposed for the Late Cretaceous Hell Creek Formation of North America – possibly comprising nearly three dozen species from over 20 genera of ankylosaura, caenagnathids, ceratopsians, dromaeosaurids, hadrosaurs, ornithomimids, pachycephalosaurs, thescelosaurs, and tyrannosaurs. However, much of the morphologic variation previously ascribed to taxonomic differences has recently been shown to be a result of stratigraphy and/or ontogeny – resulting in this rich assemblage being downsized to 13 genera and 16 species. Whereas still rich in diversity, such factors have an immediate effect towards our reconstruction of true richness.Following the example of the Hell Creek Formation, we can investigate the ontogenetic and strati-graphic origin of possible diversity inflation in other formations, and within this study, apply it to the Morrison Formation. New dating techniques are resulting in finer temporal resolution, and are changing the temporal position of well-known quarries. Differences in body size and ontogenetic stages can also affect diversity estimates. Plotting body size stratigraphically, it initially appears that larger specimens (interpreted as different species) occur higher in the section. An increase in average body size may be a legitimate trend, but there are several specimens that counter this “rule” for many genera. Likewise, dramatic allometric ontogenetic trajectories have led to the erection of at least three diplodocid genera – Amphicoelias, Seismosaurus, and Suuwassea – and it is suspected that many more Morrison Formation “species” could alternatively be explained as ontogimorphs. We have a long way to go towards revealing the true nature of Morrison Formation sauropod diversity. Although dietary partitioning undoubtedly occurred at the level of both the species (e.g., Brachiosaurus vs. Diplodocus) and between ontogenetic stages, a base of 24 levels of co-occurring divisions seems unlikely. The Morrison Formation may have exhibited a sauropod-rich assemblage unlike any other in North America, and the implications of stratigraphy, ontogeny, and variation may be minor, yet these factors alter perceived “diversity.” True diversity will not be fully understood unless these factors are considered.
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Dissertations / Theses on the topic "Morrison-Formation"

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Connely, Melissa V. "Stratigraphy and Paleoecology of the Morrison Formation, Como Bluff, Wyoming." DigitalCommons@USU, 2002. https://digitalcommons.usu.edu/etd/6736.

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The Morrison Formation at Como Bluff, Wyoming, has been historically known for containing a rich source of Late Jurassic vertebrate fossils. However, when collected, most of these fossils were not positioned into a stratigraphic or sedimentologic framework. Research shows that the Morrison Formation at Como Bluff can be divided into three members. These members can be identified by lithologic and paleontological characteristics. The lower Morrison members include the Windy Hill Member and the recently described Lake Como Member. The Windy Hill Member primarily contains near-shore marine sandstone. Megavertebrate fauna is lacking. The Lake Como Member contains illitic clay in red and green mottled paleosols with caliche and thin sandstone beds. The fauna typically consists oflarge saurian and ornithischian dinosaurs. The upper Morrison Formation includes the Talking Rocks Member. This member contains gray-green smectite-rich mudstones. The Talking Rocks Member is generally calcareous and appears to have a megavertebrate fauna similar to the Lower Morrison. The upper part of this member is typically non calcareous and the fauna is more aquatic with turtles, crocodiles, fish and smaller ornithischian dinosaurs, including some species thought to be restricted to the Cretaceous Period. The contact between the Morrison Formation and the overlying Cloverly Formation is placed at the base of the Cloverly conglomerates, which are present throughout the region. In some areas, this boundary coincides with the Jurassic/Cretaceous boundary. However, in sections of the study area, a zone of kaolinitic carbonaceous shale with Cretaceous-like plant material can be found just below the Morrison/Cl overly contact. If this bed is Cretaceous in age, then the Morrison Formation at Como Bluff is in part Early Cretaceous and not restricted to the Late Jurassic.
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Greenhalgh, Brent W. "A Stratigraphic and Geochronologic Analysis of the Morrison Formation/Cedar Mountain Formation Boundary, Utah." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1392.pdf.

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Robbins, Michael. "Sedimentology and sedimentary tectonics of the Salt Wash Member, Morrison Formation, Western Colorado." Thesis, Boston College, 2009. http://hdl.handle.net/2345/658.

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Thesis advisor: Kenneth G. Galli
Thesis advisor: Noah P. Snyder
The Brushy Basin Member of the Morrison Formation records a time of increased volcanic activity in the North American Cordillera during the Late Jurassic. Sedimentological and petrographic observations in the Brushy Basin, in conjunction with findings of widespread plutonic intrusion in the source areas, point to a volcanic pulse within the Cordilleran magmatic arc. This study investigated the subjacent Salt Wash Member, for the purpose of better constraining the timing of the volcanic pulse. Petrographic and statistical analyses of the Salt Wash sandstone identified statistically significant upsection trends in volcanic rock fragment and plagioclase feldspar at one of the four study areas. The remaining three study areas showed no upsection trends in sandstone composition that would reflect a pulse in volcanism during Salt Wash Member time. It is more likely that the Salt Wash was deposited during a time of volcanic quiescence leading up to the post-Nevadan Orogeny volcanic reactivation. Sedimentology and cementation patterns of the Salt Wash Member were also studied. Cathodoluminescence indicates that the member was well-flushed with shallow formation waters, thus preventing any calcite optical zoning. Luminescence intensity suggests that the Salt Wash Member sediments were cemented at varying depths and within differing Eh-pH regimes. Field-based sedimentological observations support a model of braided stream channel deposition across a semi-arid landscape with streamflow entering the basin from both the south and west
Thesis (MS) — Boston College, 2009
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Geology and Geophysics
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Swan, Alistair Michael. "Quantification of a distributive fluvial system : an example from the Salt Wash unit of the Morrison Formation, Utah." Thesis, University of Aberdeen, 2018. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=239012.

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Fluvial systems and their associated deposits host globally important mineral deposits, water reserves and hydrocarbons. Crucial to the extraction of these resources is an understanding of heterogeneity distribution within deposits of fluvial systems. To constrain and predict heterogeneity distribution within fluvial deposits, outcrop data together with lidar and drone derived virtual outcrop models have been collected from the Salt Wash Distributive Fluvial System (DFS) in Utah and Colorado. The study records an analysis of sedimentary architecture, facies distribution and intra-channel heterogeneity of five study sites within the proximal, medial and distal reaches of the Salt Wash DFS. Specifically the fluvial style, lateral variability of fluvial architecture, intrachannel and overbank ratio, grainsize, channel body and storey width:thickness ratios and intrachannel heterolthics at outcrops considered representative of the proximal, medial and distal portions of a DFS have been documented. Data from the study sites have been used to generate 3D reservoir models. The models have been subject to flow simulation to better understand the significance of hetergenity variability within fluvial reservoirs at an 'inter-well' scale (approximatley 0.1 km2). An indepth workflow and methodology for measuring and describing DFS channel bodies and for the construction of a reservior flow simulation model from outcrop derived data are presented here. Data collection has involved mapping and measuring; palaeocurrents, barscale accretion surfaces, storey dimensions, channel body dimensions, facies and intrachannel heterolithics. Results show clear trends within channel channel bodies and associated deposits such as, intra channel heterogenity channel body percentage, channel body grain size, storey/channel body width thickness; which can be predicted within a distributive fluvial system context, ultimately leading to better subsurface interpretation with smaller datasets. This field based study of the Salt Wash DFS, coupled with virtual outcrop models has provided a quantitive analys's of channel body architectures and facies distributions. Additionally, field work conducted on point bar deposits now illustrates the limitations of 2D outcrops when attempting to describe meandering or braided fluvial deposits and why this may have resulted in gross underestimation of meanderbelt deposits in the fluvial rock record.
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Roca, Xavier Argemi. "Tectonic and Sequence Stratigraphic Implications of the Morrison Formation-Buckhorn Conglomerate Transition, Cedar Mountain, East-central Utah." Ohio University / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1079297057.

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Ejembi, John Idoko. "SEDIMENTOLOGY AND STRATIGRAPHIC EVOLUTION OF THE PARADOX BASIN IN THE MIDDLE-LATE JURASSIC, WESTERN UNITED STATES." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/dissertations/1624.

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The Middle-Upper Jurassic sedimentary rocks (i.e., the Entrada Sandstone, Wanakah Formation, and Morrison Formation) in western Colorado were mostly deposited in the Paradox Basin and form part of the modern-day Colorado Plateau in the Cordilleran foreland region. These rocks were deposited in the Mesozoic during periods of active tectonic processes in western and eastern Laurentia due to the Cordilleran magmatism and continued rifting of Pangaea, respectively. The Middle-Late Jurassic sedimentary record in the Paradox Basin shows rapid transition in depositional environments, pulses in sedimentation, post-depositional alteration, and changes in provenance. This dissertation project utilizes three main scientific tools to address pertinent geologic questions regarding the stratigraphic evolution of these units in the Paradox Basin. U-Pb detrital zircon geochronology of sandstones from these units show local and distal provenance sources. The anisotropy of magnetic susceptibility (AMS) of sediments and rock magnetism attribute the post-depositional alteration to percolation of ferruginous fluids driven by an adjacent regional uplift. Multi-geochemical proxies in paleosols suggest variable redox conditions, and a sub-humid to humid paleoclimate with seasonal precipitation during sedimentary hiatus in the Paradox Basin.
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Wilborn, Brooke K. "Two New Dinosaur Bonebeds From the Late Jurassic Morrison Formation, Bighorn Basin, Wy: an Analysis of the Paleontology and Stratigraphy." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/35709.

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Vertebrate fossils have been discovered at several locations in the Bighorn Basin (Wyoming). The Virginia Museum of Natural History's (VMNH) digsite is located in the eastern part of the Bighorn Basin, in the Coyote Basin. Many scientists have worked within these basins trying to describe the stratigraphy. One question specifically asked is where the boundary between the Morrison Fm. (Jurassic) and the Cloverly Fm. (Cretaceous) lies. This new study attempted to show if the current method (Kvale, 1986) of determining the boundary is appropriate. The stratigraphy of the area was examined using Kvale, 1986, Ostrom, 1970, and Moberly, 1960's work in order to see which model was more robust. The fossils in the VMNH digsite were used to supplement the stratigraphic data in determining the age of specific beds. All of Ostrom's units were identified throughout the study area. There is some doubt as to whether the units would be acceptable outside of the Coyote Basin because of laterally discontinuity. Nevertheless, his description of units is satisfactory for the study area, and is more appropriate than other methods. The geologic age of the dinosaurs uncovered in the VMNH quarry is in agreement with the age determined stratigraphically. The VMNH site is below Ostrom's Unit II, which would place it in the Late Jurassic. The determination of the Jurassic/Cretaceous stratigraphic boundary has not been resolved. However, since the Pryor Conglomerate member of the Cloverly Fm. can be identified throughout this area, it is proposed as the Morrison Fm./Cloverly Fm. boundary.
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VanDeVelde, David Michael. "Interpretation of the depositional environment and paleoclimate of dinosaur sites, Bushy Basin Member of the Jurassic Morrison Formation, east-central Utah." Connect to this title online, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1155136956.

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VanDeVelde, David M. "INTERPRETATION OF THE DEPOSITIONAL ENVIRONMENT AND PALEOCLIMATE OF DINOSAUR SITES, BRUSHY BASIN MEMBER OF THE JURASSIC MORRISON FORMATION, EAST-CENTRAL UTAH." Bowling Green State University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1155136956.

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Esker, Donald Anton. "An Analysis of the Morrison Formation’s Terrestrial Faunal Diversity Across Disparate Environments of Deposition, Including the Aaron Scott Site Dinosaur Quarry in Central Utah." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1233009882.

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Books on the topic "Morrison-Formation"

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Tschudy, Robert H. Illustrations of plant microfossils from the Morrison Formation. [Reston, Va?]: U.S. Dept. of the Interior, Geological Survey, 1988.

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Jurassic West: The dinosaurs of the Morrison formation and their world. Bloomington and Indianapolis: Indiana University Press, 2007.

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O'Sullivan, Robert Brett. The base of the Upper Jurassic Morrison Formation in east-central Utah. [Reston, Va.?]: U.S. Dept. of the Interior, U.S. Geological Survey, 1985.

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O'Sullivan, Robert Brett. The base of the Upper Jurassic Morrison Formation in east-central Utah: A review of the first description of the base of the Morrison Formation in east-central Utah and some later modifications. Washington, D.C: U.S. G.P.O., 1985.

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O'Sullivan, Robert Brett. The Jurassic Wanakah and Morrison formations in the Telluride-Ouray-western Black Canyon area of southwestern Colorado: Revision of the Wanakah Formation and basal Morrison Formation in part of the Black Canyon of the Gunnison River. Washington: U.S. G.P.O., 1992.

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Yukimitsu, Tomida, and Barrett Paul M. Dr, eds. A new specimen of Apatosaurus ajax (Sauropoda, Diplodocidae) from the Morrison Formation (Upper Jurassic) of Wyoming, USA. Tokyo: National Science Museum, 2004.

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Cowan, Ewen Jun. The fluvial sedimentology of the Westwater Canyon Member, Morrison Formation (Jurassic), San Juan Basin, New Mexico, USA. Ottawa: National Library of Canada, 1990.

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Gender, voice, vernacular: The formation of female subjectivity in Zora Neale Hurston, Toni Morrison and Alice Walker. Heidelberg: Universitätsverlag C. Winter, 1999.

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Witkind, Irving Jerome. Age and correlation of Cretaceous rocks previously assigned to the Morrison(?) Formation, Sanpete-Sevier Valley area, central Utah. Washington: U.S. G.P.O., 1986.

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Owen, Douglass E. X-ray diffraction studies of the <0.5-Um fraction from the Brushy Basin Member of the Upper Jurassic Morrison Formation, Colorado Plateau. [Reston, Va.?]: Dept. of the Interior, U.S. Geological Survey, 1989.

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Book chapters on the topic "Morrison-Formation"

1

Chure, Daniel J., and George F. Engelmann. "The fauna of the Morrison Formation in Dinosaur National Monument." In Mesozoic/Cenozoic Vertebrate Paleontology: Classic Localities, Contemporary Approaches. Salt Lake City, Utah to Billings, Montana, July 19–27, 1989, 8–14. Washington, D. C.: American Geophysical Union, 1989. http://dx.doi.org/10.1029/ft322p0008.

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"The Morrison Formation." In Evolution of Fossil Ecosystems, Second Edition, 144–55. CRC Press, 2012. http://dx.doi.org/10.1201/b15128-13.

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"The Morrison Formation." In Fossil Ecosystems of North America, 152–68. CRC Press, 2008. http://dx.doi.org/10.1201/b15130-11.

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Selden, Paul A., and John R. Nudds. "The Morrison Formation." In Evolution of Fossil Ecosystems, 144–55. Elsevier, 2012. http://dx.doi.org/10.1016/b978-0-12-404629-0.50012-x.

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KELLER, W. D. "CLAY MINERALS IN THE MORRISON FORMATION ON THE COLORADO PLATEAU." In Clays and Clay Minerals, 293–94. Elsevier, 2013. http://dx.doi.org/10.1016/b978-0-08-009235-5.50023-1.

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Maidment, S. C. R., D. Balikova, and A. R. Muxworthy. "Magnetostratigraphy of the Upper Jurassic Morrison Formation at Dinosaur National Monument, Utah, and Prospects for Using Magnetostratigraphy as a Correlative Tool in the Morrison Formation." In Terrestrial Depositional Systems, 279–302. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-803243-5.00007-8.

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"Lacustrine Carbonates of the Morrison Formation (Upper Jurassic, Western Interior), East-Central Colorado, U.S.A." In Lake Basins Through Space and Time, 181–88. American Association of Petroleum Geologists, 2000. http://dx.doi.org/10.1306/st46706c14.

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Chin, Karen, and John R. Bishop. "Exploited TwiceBored Bone in a Theropod Coprolite from the Jurassic Morrison Formation of Utah, U.S.A." In Sediment–Organism InteractionsA Multifaceted Ichnology. SEPM Society for Sedimentary Geology, 2007. http://dx.doi.org/10.2110/pec.07.88.0379.

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"Regional Diagenetic Trends and Uranium Mineralization in the Morrison Formation Across the Grants Uranium Region." In A Basin Analysis Case Study, 277–301. American Association of Petroleum Geologists, 1986. http://dx.doi.org/10.1306/st22455c17.

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Gorman, Mark A., Ian M. Miller, Jason D. Pardo, and Bryan J. Small. "Plants, fish, turtles, and insects from the Morrison Formation: A Late Jurassic ecosystem near Cañon City, Colorado." In GSA Field Guide 10: Roaming the Rocky Mountains and Environs: Geological Field Trips, 295–310. Geological Society of America, 2008. http://dx.doi.org/10.1130/2008.fld010(15).

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Conference papers on the topic "Morrison-Formation"

1

Richmond, Dean R., Richard Lupia, and Marc Philippe. "CIRCOPOROXYLON FROM THE UPPER JURASSIC MORRISON FORMATION OF CENTRAL MONTANA." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-336787.

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McElroy, Brandon. "ARCHITECTURAL BIMODALITY IN FLUVIAL STRATIGRAPHY OF THE MORRISON FORMATION, USA." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-306696.

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Celestino, Serena M., Dean R. Richmond, and Mitchell W. Lukens. "UPPER JURASSIC MORRISON FORMATION CLAMS ON THE HALF SHELL, CENTRAL MONTANA." In Rocky Mountain Section - 69th Annual Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017rm-292701.

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Adams, Ashley. "EXPLORING THE PALEOENVIRONMENT OF THE MORRISON FORMATION IN THE BIGHORN BASIN." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-320607.

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Myers, Timothy S., Neil J. Tabor, Robert Eagle, Jesse B. Bateman, Steven May, Louis L. Jacobs, and Anne Weil. "PALEOCLIMATE OF THE UPPER JURASSIC MORRISON FORMATION IN OKLAHOMA AND TEXAS." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-321598.

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Apgar, Alexandra, Harvey Henson, Zachariah Seaman, Kailey M. Seaman, and Angela Henson. "EXPLORATION OF THE MORRISON FORMATION CAMARASAURUS BONE BEDS USING GROUND-PENETRATING RADAR." In 54th Annual GSA North-Central Section Meeting - 2020. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020nc-347871.

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Soltero, Alondra, Richard P. Langford, and Katherine A. Giles. "SUPRA-SALT SYNDEPOSITIONAL FOLDING IN THE JURASSIC MORRISON FORMATION, BIG GYPSUM VALLEY, COLORADO." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-335517.

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Schein, Jason P., Jason C. Poole, Richard W. Schmidt, and Laura Rooney. "REOPENING THE MOTHER'S DAY QUARRY (JURASSIC MORRISON FORMATION, MONTANA) IS YIELDING NEW INFORMATION." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-333256.

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Richmond, Dean R., Richard Lupia, Tyler C. Hunt, and Marc Philippe. "THE FIRST FOSSIL WOODS FROM THE UPPER JURASSIC MORRISON FORMATION OF WESTERN OKLAHOMA." In 52nd Annual GSA South-Central Section Meeting - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018sc-309834.

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Malone, Joshua R., David H. Malone, Bart Kowallis, and Jeffrey C. Strasser. "DETRITAL ZIRCON GEOCHRONOLOGY OF QUARTZITE GASTROLITHS IN THE JURASSIC MORRISON FORMATION, NORTHEAST UTAH." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-337559.

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Reports on the topic "Morrison-Formation"

1

Geohydrology of the Morrison Formation in the western San Juan Basin, New Mexico. US Geological Survey, 1990. http://dx.doi.org/10.3133/wri894069.

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Hydrogeology of the Morrison Formation in the San Juan structural basin, New Mexico, Colorado, Arizona, and Utah. US Geological Survey, 1990. http://dx.doi.org/10.3133/ha720j.

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Age and correlation of Cretaceous rocks previously assigned to the Morrison(?) Formation, Sanpete-Sevier Valley area, central Utah. US Geological Survey, 1986. http://dx.doi.org/10.3133/b1584.

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Map showing structure contours on the top of the upper Jurassic Morrison Formation, Powder River basin, Wyoming and Montana. US Geological Survey, 1991. http://dx.doi.org/10.3133/mf2140c.

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X-ray diffraction studies of the <0.5um fraction from the Brushy Basin Member of the Upper Jurassic Morrison Formation, Colorado Plateau. US Geological Survey, 1989. http://dx.doi.org/10.3133/b1808g.

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Regional diagenesis of sandstones in the Upper Jurassic Morrison Formation, San Juan Basin, New Mexico an Colorado; geologic, chemical, and kinetic constraints. US Geological Survey, 1990. http://dx.doi.org/10.3133/b1808h.

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Surface to subsurface cross sections showing correlation of the Dakota Sandstone, Burro Canyon (?) Formation, and upper part of the Morrison Formation in the Chama-El Vado area, Chama Basin, Rio Arriba County, New Mexico. US Geological Survey, 1987. http://dx.doi.org/10.3133/mf1496d.

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Distribution and properties of clinoptilolite-bearing tuffs in the Upper Jurassic Morrison Formation on the Ute Mountain Ute Reservation, southwestern Colorado and northwestern New Mexico. US Geological Survey, 1993. http://dx.doi.org/10.3133/b2061a.

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Maps showing percent of sandstone and total thickness of sandstone in the Westwater Canyon and Brushy Basin Members of the Morrison Formation, San Juan Basin, New Mexico. US Geological Survey, 1989. http://dx.doi.org/10.3133/i1957b.

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Isopach maps of the Westwater Canyon and Brushy Basin Members of the Morrison Formation, showing structural control of sedimentation patterns and uranium deposits, San Juan Basin, New Mexico. US Geological Survey, 1989. http://dx.doi.org/10.3133/i1957a.

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