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Academic literature on the topic 'Intermontane'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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Journal articles on the topic "Intermontane"

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Cencetti, C., and P. Conversini. "Slope instability in the Bastardo Basin (Umbria, Central Italy) – The landslide of Barattano." Natural Hazards and Earth System Sciences 3, no. 6 (2003): 561–68. http://dx.doi.org/10.5194/nhess-3-561-2003.

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Abstract. The Bastardo Basin is one of the classics Apenninic intermontane basins of central Italy. They are en-closed tectonic basins (graben and semigraben) with high anthropization, but with high vulnerability, too (seismic, hydrogeological and geomorphological). The paper concerns some aspects about slope instability in the Bastardo Basin as part of a wider research, which aims to actually define the characteristics of the liability to landslides of the Apenninic intermontane basins. In particular lithological, stratigraphical and hydrogeological conditions are analysed under which a landslide near village of Barattano has developed. This mass movement, at different times, produced partial or total occlusion of the torrent Puglia. Here geognostic investigations together with laboratory tests and subsequent monitoring of landslide area were carried out. A back analysis, based on limit equilibrium solutions for the factor of safety of the slope, provided the residual strenght properties of the soil mass along the sliding surface. The landslide of Barattano is representative of a very frequent situation (in terms of type, factors and causes of the movement, possible development of the movement) not only within Bastardo Basin, but in general within Apenninic intermontane basins, too. The study of landslide and the design of appropriate remedial measures are of great importance in terms of prevention and mitigation of geologic-hydraulic risk in Apenninic intermontane basins.

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Cordey, Fabrice, and Elizabeth S. Carter. "New Nassellaria (Radiolaria) from the Lower Jurassic of the Canadian Cordillera." Canadian Journal of Earth Sciences 33, no. 3 (1996): 444–51. http://dx.doi.org/10.1139/e96-034.

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New nassellarian radiolarians are described from the Insular and Intermontane belts of the Canadian Cordillera in British Columbia. Two new genera (Atalanta n.gen. and Nitrader n.gen.) and three new species (Atalanta emmela n.gen., n.sp., Atalanta epaphrodita n.gen., n.sp., and Nitrader montegufonensis n.gen., n.sp.) were found in Lower Jurassic carbonate concretions of the Sandilands Formation of the Queen Charlotte Islands and in a chert pebble extracted from a Cretaceous conglomerate of the Intermontane Belt possibly correlative with the Spences Bridge Group. The discovery of new taxa within two distinct belts of the Canadian Cordillera stresses their biostratigraphic significance.

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Pathak, Dinesh. "Groundwater flow modeling in an intermontane basin." Journal of Nepal Geological Society 49, no. 1 (2015): 7–15. http://dx.doi.org/10.3126/jngs.v49i1.23137.

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Groundwater model has become a commonly used tool to perform various tasks. Geological, hydrogeological and geophysical data is required for constructing 3D hydrogeological framework models. Most of the time, it is realised that there is lack of sufficient data to build a groundwater model. The present work has been achieved after systematic data collection and hydrogeological study of Nara Basin, west Japan. Groundwater has been widely exploited for drinking water supply as well as for recreation purpose as Thermal Springs in the Nara Basin. There are hundreds of wells drilled in unconsolidated sediments and some tens of deep wells encountering the fractured basement. When water is exploited from a groundwater basin, it is necessary to understand properly the groundwater flow in different aquifer zones in the basin. Hydrostratigraphic units in the unconsolidated sediments overlying the basement rocks were established by using the borehole log data. In order to have understanding of the three dimensional configuration of these units, fence diagram was constructed. The geological and hydrogeological information were used to develop a conceptual model which was further calibrated and an acceptable model was obtained. The model was validated by comparing the observed and simulated heads and discharge.

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Spence, George D., and Nancy A. McLean. "Crustal seismic velocity and density structure of the Intermontane and Coast belts, southwestern Cordillera." Canadian Journal of Earth Sciences 35, no. 12 (1998): 1362–79. http://dx.doi.org/10.1139/e98-070.

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Seismic refraction - wide-angle reflection data were recorded along a 450 km profile across the Intermontane, Coast, and Insular belts of the Canadian Cordillera. Crust and upper mantle structure was interpreted from traveltime inversion and forward-amplitude modelling, and the resultant seismic velocities were used to constrain modelling of the Bouguer gravity data along the profile. A high-velocity, high-density block in the upper 8 km of crust was interpreted as the subsurface extension of Harrison terrane; the Harrison fault at its eastern boundary may extend to at least 8 km depth and perhaps 20 km. Throughout the crust, both seismic velocities and densities are in general high beneath the Insular belt, low beneath the Coast and western Intermontane belts, and intermediate beneath the eastern Intermontane belt. However, densities are unusually low in the lower crust beneath the Coast belt (2800 kg/m3), relative to velocities (6.6-6.8 km/s). This indicates that Coast belt plutonic material is present throughout the crust; strong upper mantle reflectivity, previously interpreted on a Lithoprobe reflection line beneath the western Coast belt, may be high-density residue associated with the unusually low density plutonic material. Based on gravity data, Wrangellia must terminate sharply against the western edge of the Coast belt. In the lower crust, the lowest seismic velocities are found vertically beneath the surface trace of the Fraser fault, where velocities just above the Moho only reach 6.5 km/s, in contrast with 6.8 km/s beneath the western Coast belt and eastern Intermontane belt. This provides support for a subvertical geometry for the Fraser fault, perhaps with a broad zone of diffuse shearing in the lower crust. At this location, the Fraser fault does not appear to vertically offset the Moho, which is well-constrained at a uniform depth of km east of the Harrison fault.

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LOVE, D. W., T. M. WHITWORTH, J. M. DAVIS, and W. R. SEAGER. "Free-Phase NAPL-Trapping Features in Intermontane Basins." Environmental & Engineering Geoscience V, no. 1 (1999): 87–102. http://dx.doi.org/10.2113/gseegeosci.v.1.87.

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Irving, E., and M. T. Brandon. "Paleomagnetism of the Flores volcanics, Vancouver Island, in place by Eocene time." Canadian Journal of Earth Sciences 27, no. 6 (1990): 811–17. http://dx.doi.org/10.1139/e90-083.

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The Eocene Flores volcanics of the Insular Belt of southwestern Vancouver Island have U–Pb zircon ages of 51–50 Ma and a mean direction of magnetization (D, I) of 349.8°, 69.6 °(12 collecting sites, k = 41, α95 = 7.0°). The paleopole (81.1°N, 188.0°E, K = 20, A95 = 9.9°) agrees well with Early to Middle Eocene (54–48 Ma) paleopoles from cratonic North America and with two Early to Middle Eocene paleopoles (49 and 52 Ma) from the Intermontane Belt of the Canadian Cordillera. This shows that both the Vancouver Island section of the Insular Belt and the Intermontane Belt were in their present positions with respect to ancestral North America at that time. The data can be used as a reference for estimating tilts in bodies that themselves contain no geological evidence of paleohorizontal; as an illustration, tilts of two Eocene intrusions on Vancouver Island are estimated.

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Pospelova, Elena B., Igor N. Pospelov, Alexander V. Zhulidov, et al. "Biogeography of the Byrranga Mountains, Taymyr Peninsula, Russian Arctic." Polar Record 40, no. 4 (2004): 327–44. http://dx.doi.org/10.1017/s0032247404003833.

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The Byrranga Mountains (Gory Byrranga) are the most northern mountainous massif of the Taymyr Peninsula (Poluostrov Taymyr) in the Russian Arctic. Although studies of them began in 1736, they are one of the least studied areas of the Arctic. The region has no population, is remote, and has difficult access. As a result, the mountainous tundra ecosystems are preserved practically in a pristine state. The mountains are composed of siltstones and intrusive rocks of neutral composition; vast areas along all the mountain chain are occupied by exposed limestone. Rivers flow in deep intermontane depressions while lakes are found mainly in faults. The climate is an extremely severe continental type. Microclimatic areas provide some relief and support a rich and diverse flora. There have been 391 species and subspecies of vascular plants recorded, but no reliable data on the number of species of mosses and lichens are available. Relict thickets of tall willows are found in protected valleys of piedmont brooks, whereas relict alder-tree thickets occur on warm slopes. The mountain fauna includes nine mammal and 56 bird species. Intermontane depressions serve as corridors for seasonal migrations of wild reindeer that usually spend summers in the southern piedmont areas. Northern piedmonts and wide intermontane depressions are places where herds of musk-ox, introduced in the 1970s, concentrate. The bird fauna of relict willow thickets is highly specific and the fish fauna is quite diverse (16 species), but some species in Taymyr Lake (Ozero Taymyr) have been overexploited. This paper provides the first detailed biogeographical description of the Byrranga Mountains in English.

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Harris, M. J., D. T. A. Symons, W. H. Blackburn, and C. J. R. Hart. "Paleomagnetic and geobarometric study of the mid-Cretaceous Whitehorse Pluton, Yukon Territory." Canadian Journal of Earth Sciences 34, no. 10 (1997): 1379–91. http://dx.doi.org/10.1139/e17-110.

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This is the first of several Lithoprobe paleomagnetic studies underway to examine geotectonic motions in the northern Canadian Cordillera. Except for one controversial study, estimates for terranes underlying the Intermontane Belt in the Yukon have been extrapolated from studies in Alaska, southern British Columbia, and the northwestern United States. The Whitehorse Pluton is a large unmetamorphosed and undeformed tonalitic body of mid-Cretaceous age (~112 Ma) that was intruded into sedimentary units of the Whitehorse Trough in the Stikinia terrane. Geothermobarometric estimates for eight sites around the pluton indicate that postmagnetization tilting has been negligible since cooling through the hornblende-crystallization temperature and that the pluton is a high-level intrusion. Paleomagnetic measurements for 22 of 24 sites in the pluton yield a well-defined characteristic remanent magnetization (ChRM) direction that is steeply down and northwards. The ChRM direction gives a paleopole of 285.5°E, 81.7°N (dp = 53°, dm = 5.7°). When compared with the 112 Ma reference pole for the North American craton, this paleopole suggests that the northern Stikinia terrane has been translated northwards by 11.0 ± 4.8° (1220 ± 530 km) and rotated clockwise by 59 ± 17°. Except for an estimate from the ~70 Ma Carmacks Group volcanics, this translation and rotation estimate agrees well with previous estimates for units in the central and southern Intermontane Belt. They suggest that the terranes of the Intermontane Belt have behaved as a fairly coherent unit since the Early Cretaceous, moving northward at a minimum average rate of 2.3 ± 0.4 cm/a between ~140 and ~45 Ma.

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Greig, C. J., R. L. Armstrong, J. E. Harakal, D. Runkle, and P. van der Heyden. "Geochronometry of the Eagle Plutonic Complex and the Coquihalla area, southwestern British Columbia." Canadian Journal of Earth Sciences 29, no. 4 (1992): 812–29. http://dx.doi.org/10.1139/e92-068.

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New U–Pb, K–Ar, and Rb–Sr dates from the Eagle Plutonic Complex and adjacent map units place timing constraints on intrusive and deformational events along the southwestern margin of the Intermontane Belt. U–Pb zircon minimum dates for Eagle tonalite and gneiss (148 ± 6, 156 ± 4, and 157 ± 4 Ma) document previously unrecognized Middle to Late Jurassic magmatism and syn-intrusive deformation along the eastern margin of the Eagle Plutonic Complex and the southwestern margin of the Intermontane terrane. Widespread mid-Cretaceous (Albian–Cenomanian) resetting of K–Ar and Rb–Sr isotopic systematics in Jurassic and older rocks is coeval and cogenetic with emplacement of plutons of the Fallslake Plutonic Suite (110.5 ± 2 Ma, U–Pb) which crosscut Jurassic plutons and structures but were themselves ductilely deformed along the Pasayten fault during sinistral, east-side-up, reverse displacement. K–Ar and Rb–Sr cooling dates for the Fallslake Suite of ca. 100 Ma, including dates from mylonites along the Pasayten fault, suggest that uplift, cooling, and unroofing of the Eagle Plutonic Complex occurred in mid-Cretaceous time along the Pasayten fault. Regional geologic evidence suggests that this thermal and unroofing event affected much of the southwest margin of the Intermontane Belt. Initial 87Sr/86Sr ratios and U–Pb geochronometry for the Fallslake Plutonic Suite suggest that it was derived, in part, from preexisting and relatively nonradiogenic Paleozoic to Mesozoic crust. K–Ar dating of several stocks demonstrates widespread Early Eocene plutonism in the Coquihalla area, and dating of the Needle Peak pluton indicates plutonism continued into Middle Eocene time.

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Hastorf, Christine A., William T. Whitehead, and Sissel Johannessen. "Late Prehistoric Wood Use in an Andean Intermontane Valley." Economic Botany 59, no. 4 (2005): 337–55. http://dx.doi.org/10.1663/0013-0001(2005)059[0337:lpwuia]2.0.co;2.

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Dissertations / Theses on the topic "Intermontane"

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Fothergill, Patrick Allen. "Late Tertiary and Quaternary intermontane basin evolution in north-east Tibet : the Guide Basin." Thesis, Royal Holloway, University of London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299105.

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Wille, Michael. "Vegetation history and climate records of Colombian lowland areas rain forest, savanna and intermontane ecosystems /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2001. http://dare.uva.nl/document/85624.

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Mey, Jürgen [Verfasser], and Manfred R. [Akademischer Betreuer] Strecker. "Intermontane valley fills : recorders of climate, tectonics and landscape evolution / Jürgen Mey ; Betreuer: Manfred R. Strecker." Potsdam : Universität Potsdam, 2017. http://d-nb.info/1218401621/34.

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Mey, Jürgen [Verfasser], and Manfred [Akademischer Betreuer] Strecker. "Intermontane valley fills : recorders of climate, tectonics and landscape evolution / Jürgen Mey ; Betreuer: Manfred R. Strecker." Potsdam : Universität Potsdam, 2017. http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-103158.

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Sarapirome, Sunya. "A terrain evaluation system and GIS for road corridor selection applicable to intermontane basins in northern Thailand." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39529.

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The purpose of this study is to develop a terrain evaluation system for road corridor selection applicable to the intermontane basins in northern Thailand. The first stage involves database construction of the terrain factors which have a direct effect on construction costs. These factors are land cover, topography and landforms, surficial geology, soil strength, topsoil removal, difficulty of excavation, embankment height, construction materials, and drainage characteristics. Remote sensing and terrain evaluation techniques, field investigations and geotechnical laboratory tests are used to prepare maps of these terrain factors. The resulting maps are converted into digital database form as map layers by using Geographical Resources Analysis Support System (GRASS)--a raster-based Geographic Information System (GIS).<br>These factors are incorporated into cost models. These are constructed using local engineering cost assessments which control the selection and specification of terrain factors. Under the GRASS environment the digital map layers of different terrain attributes are converted, based on the cost models, into cost surfaces (cost per unit area). The cost surfaces are subsequently combined into an integrated terrain-cost model.<br>With different assigned end points and cost models, the applications of the single theme cost surfaces and the integrated terrain-cost models to least-cost route selection are provided. An existing road network can be incorporated in these applications. The quality and benefits of the database and system developed related to terrain conditions, data capture by remote sensing, GIS manipulation and modelling, and cost modelling are discussed.

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Lorion, Renée Michelle. "Rock phosphate, manure and compost use in garlic and potato systems in a high intermontane valley in Bolivia." Online access for everyone, 2004. http://www.dissertations.wsu.edu/Thesis/Summer2004/R%5FLorion%5F071404.pdf.

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Israel, Steve A. "Tectonic significance of the Atnarko complex, Coast Mountains, British Columbia." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/838.

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The Atnarko complex located in west-central British Columbia comprises pre-Early Jurassic metavolcanic and metasedimentary rocks, termed the Atnarko assemblage, which is structurally interleaved with Late Triassic to Early Cretaceous orthogneiss. The Atnarko assemblage correlates with continental margin assemblages found within the Coast plutonic complex. Tectonic interaction between the Insular and Intermontane superterranes resulted in several phases of deformation including; 1) poorly preserved Jurassic deformation, 2) Early to mid-Cretaceous, southwest to west directed, compression, 3) mid-Cretaceous, north to northeast directed, compression, 4) mid- to Late Cretaceous dextral and sinistral ductile/brittle shearing, and 5) post latest Cretaceous brittle faulting. Peak metamorphism coincides with generation of migmatite in the Early Cretaceous (~117-115 Ma) and is contemporaneous with penetrative ductile fabrics. The Atnarko complex had cooled below 350°C by the Late. Comparison of the Atnarko complex to equivalent portions of the orogen along strike, indicates a post mid-Cretaceous change in structural style. To the northwest the orogen records continued southwest-directed compression which dominates the deformation style; while to the southeast large dextral strike-slip faults dominate. Relative plate motions between ca. 70-60 Ma indicate that dextral transpression occurred between the Kula and North American plates. Strain during this transpressive deformation was partitioned into compressive and translational regions. The Atnarko complex area is situated at the transition between translation and compression. The conditions of the lower and middle crust within the orogen were established by how strain was partitioned across the orogen. The distributed strain also shaped how the orogen responded to Tertiary extension. Continued compression to the northwest of the Atnarko complex led to increased crustal thickness and partial melting of lower and middle crust in the Tertiary. Conversely, the cessation of compression in the southeast lead to a more stable (i.e. cooler) crustal lithosphere. A change in relative plate motions in the early Tertiary triggered full-scale, orogen-perpendicular, collapse in the northwest facilitated by decoupling between the middle and lower crusts along thermally weakened layers. Localized orogen-parallel extension occurred in the southeast which was kinematically linked to large dextral strike-slip faults where the upper crust remained coupled to the middle and lower crust.

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Lloyd, Karen Jane. "An investigation and comparison of latest Eocene (Chadronian) mammalian faunas found in the intermontane basins and plains of Colorado." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1446089.

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Radloff, Judith Katherine. "Origin and obduction of the ophiolitic Redfern Complex on the Omineca-Intermontane Belts boundary, western Cariboo Mountains, British Columbia." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27621.

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The Redfern Complex is a klippe of a dismembered, metamorphosed ophiolite resting on top of the crystalline Snowshoe Group in east-central British Columbia. The Snowshoe Group belongs to the Barkerville terrane of the Omineca Crystalline Belt while the Redfern Complex, which is structurally overlain by the Triassic black phyllite, comprises the basement to Quesnel terrane rocks of the Intermontane Belt. The contiguous boundary between the two belts lies west of the Redfern Complex and is marked by the Crooked Amphibolite, a thin, highly sheared mafic amphibolite with blocks of ultramafic rock near its base. The Redfern Complex and Crooked Amphibolite are correlative assemblages evidenced by similiarities in lithology, whole rock and mineral chemistry, and structural position. Both assemblages are composed of variable amounts of hornblende-epidote-palgioclase amphibolite, dunites, cumulate layered peridotite, and serpentinite. Chemically the rocks are subalkaline, tholeiitic basalts or gabbros and depleted peridotite with relict forsteritic olivine (Fo₈₃ and Fo[sub 87-90.7]), chromian diopside, and chromite spinel. Ultramafic rocks from both assemblages show evidence of plastic deformation under mantle conditions including disolcation glide on the high temperature (010): [100] slip system and glide climb in olivine, plus dynamic recrystallization and dynamic recovery. Although the structural succession of lithologies is best defined at the locality of the Redfern Complex, variably complete structural successions across the Crooked Amphibolite were observed which indicate that the two units occupy the same structural position on top of the Hadrynian to Paleozoic metasedimentary Snowshoe Group and that both units are structurally overlain by the Triassic black phyllite. The two assemblages differ in intensity of metamorphism and degree of hydration alteration related to their relative structural positions and their size and permiability. While the Crooked Amphibolite bears the chlorite-zone assemblage actinolite + chlorite + plagioclase and related ultramafic rocks are dominantly completely serpentinized, the Redfern amphibolite metamorphic assemblage of hornblende + albite + epidote belongs to the albite-epidote amphibolite facies. In addition the large, coherent Redfern peridotite body shows evidence of complete serpentinization only at its margins and also bears an amphibolite facies assemblage of tremolite + olivine + chlorite + talc. Thus the Redfern Complex experienced more intense metamorphism because it occupied a deeper structural level than the Crooked Amphibolite. The local and regional setting of the Redfern Complex reflects a complex geologic history of multiple defomration episodes and syntectonic, locally intense metamorphism related to the emplacement of the Complex onto the Snowshoe Group along the east-vergent Redfern thrust. Prior to emplecement, the Snowshoe Group underwent one enigmatic phase of deformation and metamorphism. The intrusion of the felsic Redfern orthogneiss which has a poorly constrained U-Pb age of Devono-Mississippian may be related to this deformation. A second orthogneiss which intrudes the Redfern amphibolite and contains ultramafic xenoliths probably intruded during or soon after emplacement. Tight, east-vergent folds and a pervasive second foliation developed in the Snowshoe Group while tight folds and a pervasive foliation developed in the Redfern amphibolite and Triassic black phyllite during emplacement. Microfracturing and grain sliding predominantly on the margins of the Redfern peridotite are the only structures developed during emplacement. Metamorphism peaked after emplacement stresses had relaxed, producing sillimanite in the Snowshoe metapelites, albite-epidote amphibolite assemblages in mafic lithologies, and possibly only kyanite in the black phyllites. Post-emplacement deformation accompanied sustained but decreased temperatures of metamorphism. Large-scale, west-vergent, overturned to the east buckles fold the Redfern thrust and refold earlier structures and produced the current map patterns and distribution of foliation. Kinked metamorphic porphyroblasts and an S₂ crenulation cleavage overgrown by staurolite in the Triassic black phyllite indicate that intense deformation and fluid enhanced retrograde metamorphic reactions were localised in a structurally lower "pocket" of this unit in the core of a post-emplacement synform on the east side of the map area.<br>Science, Faculty of<br>Earth, Ocean and Atmospheric Sciences, Department of<br>Graduate

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Friedman, Richard M. "Geology and geochronometry of the eocene Tatla Lake metamorphic core complex, western edge of the intermontane belt, British Columbia." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28780.

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The Tatla Lake Metamorphic Complex (TLMC) underlies 1000 km² on the western side of the Intermontane Belt (1MB) northeast of the Yalakom fault Three fault-bounded lithotectonic assemblages are recognized in the area studied: an amphibolite grade gneissic and migmatitic core, structurally overlain by a 1 to 2.5 + km-thick zone of amphibolite and greenschist grade mylonite and ductilely sheared metamorphic rocks, the ductilely sheared assemblage (DSA), which is in turn structurally overlain by weakly deformed to unstrained subgreenschist grade rocks of the upper plate which flank the TLMC on three sides. Structures in the gneissic core include a gneissic foliation and schistosity (Sic), which has been deformed by west to northwest-trending tight to isoclinal folds (F2c). Tectonic fabrics observed throughout the DSA which formed during Ds deformation include a gently dipping mylonitic foliation (Ss), containing a mineral elongation (stretching) lineation (Ls) which trends towards 280° ± 20°. Minor folds of variable trend (Fs), almost exclusively confined to DSA metasedimentary rocks, are interpreted as coeval with ductile shear. Vergence of these folds defines movement sense and direction of top towards 290° ± 20°. Kinematic indicators from DSA rocks which have not been deformed by syn-ductile shear folds indicate a top-to-the-west sense of shear while those deformed by Fs folds yield conflicting results, with a top-to-the-west sense predominating. The entire lower plate comprising the TLMC has been deformed by broad, upright, west to west-northwest trending, shallowly plunging map-scale folds (F3) during D3, which deform Sic and Ss surfaces. The steeply dipping, northwest-trending Yalakom fault truncates all units and structures of the TLMC. Gently to moderately dipping normal faults of Ds and post-D3 relative age are the southern and eastern boundaries between DSA upper plate rocks and 1MB lower plate rocks. U-Pb zircon dates from igneous arid meta- igneous rocks from the lower plate range from Late Jurassic (157 Ma) through Eocene (47 Ma). These dates bracket the timing of Cretaceous (107 Ma to 79 Ma, in the core) and Eocene (55 Ma to 47 Ma, in the DSA) deformation and metamorphism in the lower plate. Biotite and hornblende K-Ai dates of 53.4 Ma to 45.6 Ma for lower plate rocks are in sharp contrast to Jurassic dates from nearby upper plate rocks; they record the uplift and cooling of the TLMC. Whole rock initial ⁸⁷Sr/⁸⁶Sr ratios (and for most samples present-day values) of less ≤0.704 have been determined for igneous and meta-igneous rocks of the TLMC; such values are typical of magmatic arc rocks of the 1MB and Coast Plutonic Complex of B.C. Whole rock major and trace element chemistry of lower plate igneous and meta-igneous rocks indicate sub-alkaline, calcalkaline, volcanic arc affinities. Garnet-biotite temperatures (interpreted as Eocene in age), from pelitic schist in the southern part of the DSA increase from about 400 ± 50 to 650 ± 50 C with increasing structural depth. A GT-BI-QZ-Al₂SiO₅ pressure of 8 ± 3 kb has been calculated for one of these samples. A T-P of 650 ± 50 C and 5.3 ± 3 kb, calculated from inclusions and garnet cores in a small pelitic pendant in the northwest part of the DSA, reflects conditions during intrusion of the surrounding 71 ± 3 Ma igneous body. A pressure of 7.2 ± 1.4 kb, based on the total Al in hornblende, has been calculated for this body. Cretaceous ductile deformation in the gneissic core may be related to folding and thrusting which occured in high level rocks to the west and east of the field area. During Early Eocene time (55-47 Ma) the TLMC acquired the characteristics of a Cordilleran metamorphic core complex. Mylonites of the DSA were emplaced by faulting beneath weakly deformed, low metamorphic grade rocks of the upper plate. Synchronously, metamorphic rocks of the gneissic and migmatitic core of the TLMC were moved to higher crustal levels along the footwall of the DSA normal ductile shear zone. The formation of F3 folds and final uplift of the TLMC (47-35 Ma) is postulated to be the consequence of transpression related to later Eocene dextral motion along the Yalakom fault The TLMC has structural style and timing of deformation similar to metamorphic core complexes in southeastern B.C. Local and regional evidence is consistent with the formation of the TLMC in a regional extensional setting within a vigorous magmatic arc.<br>Science, Faculty of<br>Earth, Ocean and Atmospheric Sciences, Department of<br>Graduate

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Books on the topic "Intermontane"

1

Tornes, L. H. National Water-Quality Assessment Program: Northern Rockies Intermontane Basins. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Tornes, L. H. National Water-Quality Assessment Program: Northern Rockies Intermontane Basins. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Tornes, L. H. National Water-Quality Assessment Program: Northern Rockies Intermontane Basins. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Tornes, L. H. National Water-Quality Assessment Program: Northern Rockies Intermontane Basins. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Tornes, L. H. National Water-Quality Assessment Program: Northern Rockies Intermontane Basins. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Tornes, L. H. National Water-Quality Assessment Program: Northern Rockies Intermontane Basins. U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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International Symposium on Intermontane Basins: Geology & Resources (1989 Chiang Mai, Thailand). Proceedings of the International Symposium on Intermontane Basins--Geology & Resources. Edited by Theerapongs Thanasuthipitak, Prayote Ounchanum, and Mahāwitthayālai Chīang Mai. Chiang Mai University, 1989.

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Walker, S. Post-pastoral succession in intermontane valleys and basins of eastern South Island, New Zealand. Dept. of Conservation, 2003.

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Hanes, Richard Clay. Lithic assemblages of Dirty Shame Rockshelter: Changing traditions in the northern intermontane. Dept. of Anthropology, University of Oregon, 1988.

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Yorath, C. J., G. J. Woodsworth, R. P. Riddihough, et al. B-1 Intermontane Belt (Skeena Mountains) to Insular Belt (Queen Charlotte Islands). Geological Society of America, 1985. http://dx.doi.org/10.1130/dnag-cot-b-1.

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Book chapters on the topic "Intermontane"

1

Dhital, Megh Raj. "Terai and Intermontane Basins." In Geology of the Nepal Himalaya. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-02496-7_34.

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Tandon, Sampat K., and Vimal Singh. "Duns: Intermontane Basins in the Himalayan Frontal Zone." In World Geomorphological Landscapes. Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-017-8029-2_12.

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Dvorak, Bruce, and Tom Woodfin. "Green Roofs in Intermontane Semi-Arid Grassland Ecoregions." In Ecoregional Green Roofs. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-58395-8_6.

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Dhital, Megh Raj, and Basanta Raj Adhikari. "Thrust Sheets, Tectonic Windows, and Intermontane Basins in the Nepal Himalaya." In Society of Earth Scientists Series. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40593-9_11.

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Courel, L., X. B. Liu, and H. Wang. "Polyphase Coalification in French Intermontane Coal Basins of the Late Carboniferous." In Hydrocarbon and Petroleum Geology of France. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78849-9_28.

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Chamlagain, Deepak, and Dipendra Gautam. "Seismic Hazard in the Himalayan Intermontane Basins: An Example from Kathmandu Valley, Nepal." In Mountain Hazards and Disaster Risk Reduction. Springer Japan, 2014. http://dx.doi.org/10.1007/978-4-431-55242-0_5.

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Komatsu, Tetsuya. "Geomorphic Features of the Eastern Pamirs, with a Focus on the Occurrence of Intermontane Basins." In Advances in Asian Human-Environmental Research. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-23198-3_4.

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Della Seta, Marta, Laura Melelli, and Gilberto Pambianchi. "Relief, Intermontane Basins and Civilization in the Umbria-Marche Apennines: Origin and Life by Geological Consent." In World Geomorphological Landscapes. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-26194-2_27.

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Reiter, Marshall. "Hydrogeothermal studies on the southern part of Sandia National Laboratories/Kirtland Air Force Base-data regarding ground-water flow across the boundary of an intermontane basin." In Faults and Subsurface Fluid Flow in the Shallow Crust. American Geophysical Union, 1999. http://dx.doi.org/10.1029/gm113p0207.

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Kehoe, Alice B. "The Intermontane West and California." In North American Indians. Routledge, 2017. http://dx.doi.org/10.4324/9781351219983-7.

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Conference papers on the topic "Intermontane"

1

Colpron, Maurice, Patrick J. Sack, James L. Crowley, and Murray M. Allan. "LATE TRIASSIC TO MIDDLE JURASSIC MAGMATISM IN THE INTERMONTANE TERRANES OF YUKON." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-280151.

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Colpron, Maurice, James L. Crowley, and Patrick J. Sack. "LATE TRIASSIC – JURASSIC MAGMATISM, METALLOGENY AND TECTONICS IN THE INTERMONTANE TERRANES OF YUKON." In 115th Annual GSA Cordilleran Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019cd-329176.

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Tikoff, Basil, Kathy K. Davenport, and Christian Stanciu. "TECTONIC HISTORY OF CRETACEOUS-PALEOGENE WESTERN IDAHO: EVIDENCE FOR INTERMONTANE AND INSULAR TERRANE COLLISIONS." In 115th Annual GSA Cordilleran Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019cd-329208.

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Smith, Tyson Michael, Kurt E. Sundell, Shelby Johnston, et al. "LARAMIDE-DRIVEN EROSION, INTERMONTANE BASIN FILL, AND DRAINAGE REORGANIZATION IN NORTH-CENTRAL NEW MEXICO." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-306703.

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Martín Merino, Germán, Matteo Roverato, Jorge Toro, et al. "NEW INSIGHTS ON THE STRATIGRAPHY, SEDIMENTOLOGY AND DEFORMATIONAL EVOLUTION OF AN ANDEAN INTERMONTANE QUATERNARY PALEOLAKE." In GSA Annual Meeting in Indianapolis, Indiana, USA - 2018. Geological Society of America, 2018. http://dx.doi.org/10.1130/abs/2018am-319388.

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-M. Le Nindre, Y., Ph Gombert, J. M. Miehe, Y. Barthelemy, R. Prada, and G. Mendez. "AMT Geophysical exploration and hydrodynamic modelling of an intermontane pull apart basin - La Cuenca de Cochabamba." In 56th EAEG Meeting. European Association of Geoscientists & Engineers, 1994. http://dx.doi.org/10.3997/2214-4609.201410262.

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A. Bayramova, G. "Problems of the Abyssal Structure and the Presence of Oil and Gas in the Kuza Intermontane Basin." In 60th EAGE Conference and Exhibition. European Association of Geoscientists & Engineers, 1998. http://dx.doi.org/10.3997/2214-4609.201408533.

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Cobbold, P. R., E. A. Rossello, and F. O. Marques. "Compressional Growth Strata Of Late Oligocene To Miocene Age In The Loncopué And Catan-Lil Intermontane Basins, Neuquén Province, Argentina (37°- 40° S)." In 9th Simposio Bolivariano - Exploracion Petrolera en las Cuencas Subandinas. European Association of Geoscientists & Engineers, 2006. http://dx.doi.org/10.3997/2214-4609-pdb.111.79.

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Reports on the topic "Intermontane"

1

Gabrielse, H., J. W. H. Monger, D. J. Tempelman-Kluit, and G. J. Woodsworth. Part C: Intermontane Belt [Chapter 17: Structural Styles]. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/134113.

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Robbins, William G., and Donald W. Wolf. Landscape and the intermontane Northwest: an environmental history. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1994. http://dx.doi.org/10.2737/pnw-gtr-319.

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Preto, B. A., and K. E. Northcote. Chapter 6: Intermontane Belt: Regional Geology of the southern Nicola Belt. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1991. http://dx.doi.org/10.4095/132371.

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Rusmore, M. E., and G. J. Woodsworth. A Note On the Coast - Intermontane Belt Transition, Mount Waddington map area, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1989. http://dx.doi.org/10.4095/127476.

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Monger, J. W. H. Structural evolution of the south-western Intermontane Belt, Ashcroft and Hope map areas, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/120183.

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Journeay, J. M., and J. W. H. Monger. Interactive geoscience library, digital information for the Coast and Intermontane belts of southwestern British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1998. http://dx.doi.org/10.4095/209907.

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Pohler, S. M. L., M. J. Orchard, and D. J. Tempelman-Kluit. Ordovician Conodonts Identify the Oldest Sediments in the Intermontane Belt, Olalla, South-Central British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1989. http://dx.doi.org/10.4095/127446.

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Mahoney, J. B., J. Vaughn, P. K. Link, J. W. Riesterer, C J Hickson, and R. M. Friedman. Late Cretaceous and Paleocene strata along the Intermontane-Methow terrane boundary, southern Chilcotin Plateau, south-central British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1999. http://dx.doi.org/10.4095/210160.

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Friedman, R. M., and P. Van Der Heyden. Late Permian U-Pb dates for the Farwell and northern Mt. Lytton plutonic bodies, Intermontane Belt, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1992. http://dx.doi.org/10.4095/132797.

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Hamblin, A. P. Hydrocarbon potential of the Tertiary succession of Intermontane Basins of the Cordillera: preliminary conceptual synthesis of background data. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2008. http://dx.doi.org/10.4095/225186.

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