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Journal articles on the topic 'Rocky Creek'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Carter, Rae, Sean LeRoy, Trisalyn Nelson, Colin P. Laroque, and Dan J. Smith. "Dendroglaciological investigations at Hilda Creek rock glacier, Banff National Park, Canadian Rocky Mountains." Géographie physique et Quaternaire 53, no. 3 (2002): 365–71. http://dx.doi.org/10.7202/004777ar.

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Abstract Dendroglaciological techniques are used to provide evidence of historical rock glacier activity at Hilda Creek rock glacier in the Canadian Rockies. The research focuses on the sedimentary apron of the outermost morainal deposit, where excavations in 1997 uncovered six buried tree boles that had been pushed over and entombed by distally spilled debris. Cross-sectional samples cross- dated with a local Engelmann spruce tree-ring chronology were shown to have been killed sometime after 1856. Based on the extent of the excavation, the data indicate that Hilda Creek rock glacier has conti

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2

Chamberlain, V. E., R. St J. Lambert, and J. G. Holland. "Geochemistry and geochronology of the gneisses east of the Southern Rocky Mountain Trench, near Valemount, British Columbia." Canadian Journal of Earth Sciences 22, no. 7 (1985): 980–91. http://dx.doi.org/10.1139/e85-103.

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Petrographic, geochemical, and geochronological data are presented on the gneisses of the Bulldog Creek block, the Mount Blackman block, and the Hugh Allan Creek block, which lie to the east of the Southern Rocky Mountain Trench (SRMT) south of Valemount, British Columbia.Petrographical and geochemical data, especially immobile-trace-element ratios (Nb: Y, Ti: Zr), and CaO versus Y and AFM plots are used to deduce the probable origins and protoliths of the gneisses. The Mount Blackman block consists of a psammitic paragneiss, probably derived from an immature arkosic sedimentary protolith, int

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3

Young, Michael K. "Movement and characteristics of stream-borne coarse woody debris in adjacent burned and undisturbed watersheds in Wyoming." Canadian Journal of Forest Research 24, no. 9 (1994): 1933–38. http://dx.doi.org/10.1139/x94-248.

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Following fire, changes in streamflow and bank stability in burned watersheds can mobilize coarse woody debris. In 1990 and 1991, I measured characteristics of coarse woody debris and standing riparian trees and snags in Jones Creek, a watershed burned in 1988, and in Crow Creek, an unburned watershed. The mean diameter of riparian trees along Jones Creek was less than that of trees along Crow Creek, but the coarse woody debris in Jones Creek was greater in mean diameter. Tagged debris in Jones Creek was three times as likely to move, and moved over four times as far as such debris in Crow Cre

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4

McMechan, M. E. "Walker Creek fault zone, central Rocky Mountains, British Columbia-southern continuation of the Northern Rocky Mountain Trench fault zone." Canadian Journal of Earth Sciences 37, no. 9 (2000): 1259–73. http://dx.doi.org/10.1139/e00-038.

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Walker Creek fault zone (WCFZ), well exposed in the western Rocky Mountains of central British Columbia near 54°, comprises a 2 km wide zone of variably deformed Neoproterozoic and Cambrian strata in fault-bounded slivers and lozenges. Extensional shear bands, subhorizontal extension lineations, slickensides, mesoscopic shear bands, and other minor structures developed within and immediately adjacent to the fault zone consistently indicate right-lateral displacement. Offset stratigraphic changes in correlative Neoproterozoic strata indicate at least 60 km of right-lateral displacement across t

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5

Hall, Russell L. "New Lower Jurassic ammonite faunas from the Fernie Formation, southern Canadian Rocky Mountains." Canadian Journal of Earth Sciences 24, no. 8 (1987): 1688–704. http://dx.doi.org/10.1139/e87-162.

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New ammonite faunas are described from sections along Bighorn and Scalp creeks in central-western Alberta where Lower Jurassic parts of the Fernie Formation are exposed. The first record of the upper Sinemurian Obtusum Zone from the Fernie is based on the occurrence of Asteroceras cf. stellare and Epophioceras cf. breoni in the basal pebbly coquina on Bighorn Creek. The overlying Red Deer Member has yielded Amaltheus cf. stokesi, representing the upper Pliensbachian Margaritatus Zone; in immediately superjacent strata the first North American examples of ?Amauroceras occur together with Protog

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6

Schweinsberg, Avriel D., Jason P. Briner, Joseph M. Licciardi, Ralph R. Shroba, and Eric M. Leonard. "Cosmogenic 10Be exposure dating of Bull Lake and Pinedale moraine sequences in the upper Arkansas River valley, Colorado Rocky Mountains, USA." Quaternary Research 97 (April 27, 2020): 125–39. http://dx.doi.org/10.1017/qua.2020.21.

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AbstractMany formerly glaciated valleys in the western United States preserve detailed glacial features that span the penultimate glaciation through the last deglaciation; however, numerical age control is limited in many of these systems. We report 35 new cosmogenic 10Be surface exposure ages of moraine boulders in the Sawatch Range, Colorado. Eight ages suggest Bull Lake moraines in Lake Creek (range: 132–120 ka, n = 4) and Clear Creek (range: 187–133 ka, n = 4) valleys may correlate with Marine Isotope Stage 6. In Lake Creek valley, 22 10Be ages from Pinedale end moraines average 20.6 ± 0.6

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7

Sanger, Jennifer C., John Kanowski, Carla P. Catterall, and Ralph Woodford. "Restoration of forest structure in managed regrowth at Rocky Creek Dam, Australia." Ecological Management & Restoration 9, no. 2 (2008): 143–45. http://dx.doi.org/10.1111/j.1442-8903.2008.00406.x.

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8

Taniguchi, Yoshinori, Frank J. Rahel, Douglas C. Novinger, and Kenneth G. Gerow. "Temperature mediation of competitive interactions among three fish species that replace each other along longitudinal stream gradients." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 8 (1998): 1894–901. http://dx.doi.org/10.1139/f98-072.

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Competitive ability changed across a range of 3-26°C among three fish species that show longitudinal replacement in Rocky Mountain streams: brook trout (Salvelinus fontinalis) at high elevations, brown trout (Salmo trutta) at middle elevations, and creek chub (Semotilus atromaculatus) at low elevations. Competitive ability was measured by food consumption and aggression in a stream tank. At 20°C, the trout species were competitively equal, and both were competitively superior to creek chub. Creek chub began to have competitive success against brook trout at 22°C and brown trout at 24°C, temper

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9

Struik, L. C. "Imbricated terranes of the Cariboo gold belt with correlations and implications for tectonics in southeastern British Columbia." Canadian Journal of Earth Sciences 23, no. 8 (1986): 1047–61. http://dx.doi.org/10.1139/e86-105.

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The Cariboo gold belt of east-central British Columbia is divided into four fault-bounded sequences of distinct stratigraphy. They are, from east to west, the Cariboo (continental-shelf sediments), Barkerville (continental-shelf sediments and intercalated volcanics), Slide Mountain (rift-related submarine pillow basalt, chert, and diorite) and Quesnel (island-arc sediments and subaqueous volcanics) terranes. Each is separated from others by thrust faults. Grit, phyllite, limestone, and volcanics of the Barkerville terrane may be correlative with the Eagle Bay Formation near Adams Lake and the

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10

Simandl, George J., Suzanne Paradis, Johnathan Savard, et al. "Mineral control on the geochemistry of the Rock Canyon Creek REE-F-Ba deposit, British Columbia, Canada." Geochemistry: Exploration, Environment, Analysis 21, no. 2 (2021): geochem2020–010. http://dx.doi.org/10.1144/geochem2020-010.

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The Rock Canyon Creek carbonate-hosted REE-F-Ba deposit has tectonic, stratigraphic and structural similarities with Mississippi Valley-type and sparry magnesite deposits in the SE Rocky Mountains. The main REE-fluorite zone is a steeply dipping body, extending 1100 m along-strike, 50 m wide and 100 m deep. It spatially coincides with pre-existing crackle breccias in carbonate rocks, and consists of dolomite, fluorite, barite, pyrite, quartz, K-feldspar, calcite, porous apatite, REE-fluorocarbonates and REE-phosphates. The main fluorocarbonates are bastnaesite, parisite and synchysite. Monazit

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11

Mead, Jim I., Christopher J. Bell, and Lyndon K. Murray. "Mictomys Borealis (Northern Bog Lemming) and the Wisconsin Paleoecology of the East-Central Great Basin." Quaternary Research 37, no. 2 (1992): 229–38. http://dx.doi.org/10.1016/0033-5894(92)90084-v.

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AbstractTeeth of northern bog lemming, Mictomys borealis, are reported from Cathedral and Smith Creek caves and represent the first Wisconsin remains of the genus from the Great Basin. Specimens from Cathedral Cave, Snake Range, are associated with U-series ages of 24,000 to 15,000 yr B.P. Previous work with pollen and packrat middens, dating to the same age as the Mictomys, indicate that Smith Creek Canyon contained a riparian, locally mesic community, including Picea engelmannii (spruce), Betula sp. (birch), Cercocarpus sp. (mountain mahogany), and Artemisia sp. (sagebrush) among other speci

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12

Schaubs, Peter M., and Sharon D. Carr. "Geology of metasedimentary rocks and Late Cretaceous deformation history in the northern Valhalla complex, British Columbia." Canadian Journal of Earth Sciences 35, no. 9 (1998): 1018–36. http://dx.doi.org/10.1139/e98-048.

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The Valhalla complex, a Cordilleran metamorphic core complex, is a domal culmination made up of gently dipping interlayered sheets of igneous and supracrustal rocks that were deformed and metamorphosed in the Middle Jurassic and Late Cretaceous, and exhumed by extensional faults in the Eocene. Mapping, fabric, and metamorphic studies of predominantly metasedimentary rocks in Valhalla and Passmore domes in the northern part of the complex, together with published geochronological data, reveal a significant Late Cretaceous tectonic history. This includes extensive magmatism, the culmination of u

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13

Matthews, D. "The Potential Impact of a Proposed Dam on a Platypus Population: A Baseline Study." Australian Mammalogy 20, no. 2 (1998): 310. http://dx.doi.org/10.1071/am98322.

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The population of the far North Coast of New South Wales is growing rapidly. It is estimated that the number of people served by the Rous County water supply will increase threefold in the next fifty years. Steps are being taken to manage demand and to provide an additional source of water by pumping from the Wilson River at Lismore. It is recognised that a new dam will eventually be required. The dam currently providing the bulk of the Rous County supply is on Rocky Creek near Dorroughby. A second dam is planned for Rocky Creek about 10 km downstream from the existing dam. This will be built

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14

Cruden, David M., and C. Derek Martin. "Before the Frank Slide." Canadian Geotechnical Journal 44, no. 7 (2007): 765–80. http://dx.doi.org/10.1139/t07-030.

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The Frank Slide occurred on the east limb of the Turtle Mountain Anticline, which was thrust up along the folded and splayed Turtle Mountain Fault. Easterly dipping, Paleozoic limestones and dolomites then rested on sheared, weaker, Mesozoic clastic rocks and coal strata. Cordilleran glaciers steepened the eastern flank of Turtle Mountain but left buttressing kame moraines. These were eroded by the Crowsnest River, which was pushed against Turtle Mountain between its North and South Peaks by the growth of the alluvial fan of Gold Creek. Blairmore Group mudstones and shales beneath the moraines

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15

Mitchell, M. J., M. B. David, D. G. Maynard, and S. A. Telang. "Sulfur constituents in soils and streams of a watershed in the Rocky Mountains of Alberta." Canadian Journal of Forest Research 16, no. 2 (1986): 315–20. http://dx.doi.org/10.1139/x86-053.

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Sulfur constituents of soils and streams were measured in the Marmot Basin watershed of the Rocky Mountains (Alberta). Total S in the soils ranged from 2.5 to 49.8 μmol/g dry mass; carbon-bonded S and ester sulfate were the dominant S constituents (67–86 and 5–32% of total S, respectively), with sulfate ranging from 0.1 to 8.1% of total S. Organic S was 12–21% of total S in stream waters. High concentrations of sulfate (93–355 μmol/L), Ca (763–1075 μmol/L), Mg (387–765 μmol/L), and C (1930–4160 μmol/L) in streams were due to mineral weathering. Atmospheric inputs of S at Marmot Creek were much

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16

Kubli, Thomas E., and Philip S. Simony. "The Dogtooth Duplex, a model for the structural development of the northern Purcell Mountains." Canadian Journal of Earth Sciences 31, no. 11 (1994): 1672–86. http://dx.doi.org/10.1139/e94-150.

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Structural analysis based on recent detailed mapping of part of the Dogtooth Range of the northern Purcell Mountains confirms and refines a previous interpretation of a duplex structure, which, after its formation, was carried passively in the hanging wall of the out-of-sequence Purcell Thrust. Several parameters, such as thrust spacing, thrust displacement, and fold shape, place geometric constraints on the Dogtooth Duplex. Thrust spacing/displacement ratios indicate that the older structures of the western Dogtooth Range can be approximated by an antiformal stack model, whereas the younger s

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17

Lickorish, W. H. "Structural evolution of the Porcupine Creek anticlinorium, Western Main Ranges, Rocky Mountains, British Columbia." Journal of Structural Geology 15, no. 3-5 (1993): 477–89. http://dx.doi.org/10.1016/0191-8141(93)90142-w.

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18

Frost, Carol D., and Fabio A. Da Prat. "Petrogenetic and tectonic interpretation of strongly peraluminous granitic rocks and their significance in the Archean rock record." American Mineralogist 106, no. 8 (2021): 1195–208. http://dx.doi.org/10.2138/am-2022-8001.

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Abstract Strongly peraluminous granitic rocks (SPG), defined by an aluminum saturation index ≥1.1, become abundant in the rock record in the Neoarchean. This study identifies three different varieties of Neoarchean SPG in the Archean Wyoming Province, U.S.A. These include calcic SPG, represented by the Webb Canyon Gneiss and Bitch Creek Gneiss of the Teton Range; calc-alkalic to alkali-calcic suites composed entirely of SPG, including the Rocky Ridge garnet granite gneiss of the northern Laramie Mountains and the Bear Mountain granite in the Black Hills; and calc-alkalic to alkali-calcic suite

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19

PERKINS, PHILIP D. "A revision of the Australian species of the water beetle genus Hydraena Kugelann (Coleoptera: Hydraenidae)." Zootaxa 1489, no. 1 (2007): 1–207. http://dx.doi.org/10.11646/zootaxa.1489.1.1.

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The Australian species of the water beetle genus Hydraena Kugelann, 1794, are revised, based on the study of 7,654 specimens. The 29 previously named species are redescribed, and 56 new species are described. The species are placed in 24 species groups. High resolution digital images of all primary types are presented (online version in color), and geographic distributions are mapped. Male genitalia, representative female terminal abdominal segments and representative spermathecae are illustrated. Australian Hydraena are typically found in sandy/gravelly stream margins, often in association wi

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20

Storer, John E. "Primates of the Lac Pelletier Lower Fauna (Eocene: Duchesnean), Saskatchewan." Canadian Journal of Earth Sciences 27, no. 4 (1990): 520–24. http://dx.doi.org/10.1139/e90-048.

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Four genera of primates are present in the early to mid-Duchesnean Lac Pelletier Lower Fauna. Phenacolemur leonardi sp.nov., Trogolemur sp., Omomys sp., and Macrotarsius cf. M. montanus make up the latest diverse primate assemblage known from North America and from the Great Plains. This primate assemblage is similar to the earliest Duchesnean assemblage from the Wood locality, Badwater Creek area of central Wyoming, and primate genera appear to have been widely distributed through the Great Plains and Rocky Mountains in the Uintan–Duchesnean.

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21

Leckie, Dale A., and David Craw. "Westerly derived Early Cretaceous gold paleoplacers in the Western Canada foreland basin, southwestern Alberta: tectonic and economic implications." Canadian Journal of Earth Sciences 32, no. 8 (1995): 1079–92. http://dx.doi.org/10.1139/e95-090.

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Albian-aged (Early Cretaceous) igneous pebble to cobble conglomerates fill multiple, northeast–southwest-oriented, subparallel channels in the upper Blairmore Group (upper Beaver Mines and Mill Creek formations) of the Rocky Mountain foreland basin, southwestern Alberta and southeastern British Columbia. Paleocurrent data show that the conglomerate was derived from the west. Clast petrography implies a provenance that includes granitoids, mafic volcanics, low-grade metamorphic rocks, and shallow-level (ca. 7 km depth) postmetamorphic quartz veins formed from meteoric fluids. The conglomerate w

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22

Cooper, David J. "Water and soil chemistry, floristics, and phytosociology of the extreme rich High Creek fen, in South Park, Colorado, U.S.A." Canadian Journal of Botany 74, no. 11 (1996): 1801–11. http://dx.doi.org/10.1139/b96-217.

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An extreme rich fen complex located in South Park, Colorado, is the most southern representative of this ecosystem type known in North America and the first described from the Southern Rocky Mountains. The fen is fed by ground water emerging from glacial outwash and has pH ranging from 7.6 to 8.3 and Ca2+ concentrations greater than 50 mg kg−1. The very low precipitation–evapotranspiration ratio in South Park causes Na+ and Mg2+ salts to accumulate in some soils, forming sodic peats that support halophyte communities. Character species of this fen include Kobresia simpliciuscula, Trichophorum

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23

McDonough, Michael R., and Philip S. Simony. "Structural evolution of basement gneisses and Hadrynian cover, Bulldog Creek area, Rocky Mountains, British Columbia." Canadian Journal of Earth Sciences 25, no. 10 (1988): 1687–702. http://dx.doi.org/10.1139/e88-159.

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Two gneiss bodies are contained in thrust sheets on the west edge of the Rocky Mountain Main Ranges near Valemount, British Columbia. The Bulldog Gneiss comprises Aphebian or older paragneiss and amphibolitic gneiss intruded by Aphebian orthogneiss sheets. The Yellowjacket Gneiss is granodioritic orthogneiss of unknown age. Both gneiss bodies are basement highs with thin Hadrynian metasediment cover sequences. The cover sequences are assigned to the lower Miette Group and are correlated with Horsethief Creek Group.Internal shortening of gneiss thrust sheets is expressed by recumbent folding an

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24

Leonard, Eric M., Mitchell A. Plummer, and Paul E. Carrara. "Numerical modeling of the Snowmass Creek paleoglacier, Colorado, and climate in the Rocky Mountains during the Bull Lake glaciation (MIS 6)." Quaternary Research 82, no. 3 (2014): 533–41. http://dx.doi.org/10.1016/j.yqres.2014.03.001.

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AbstractWell-preserved moraines from the penultimate, or Bull Lake, glaciation of Snowmass Creek Valley in the Elk Range of Colorado (USA) present an opportunity to examine the character of the high-altitude climate in the Rocky Mountains during Marine Oxygen Isotope Stage 6. This study employs a 2-D coupled mass/energy balance and flow model to assess the magnitudes of temperature and precipitation change that could have sustained the glacier in mass-balance equilibrium at its maximum extent during the Bull Lake glaciation. Variable substrate effects on glacier flow and ice thickness make the

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25

Woodford, By Ralph. "Converting a dairy farm back to a rainforest water catchment. The Rocky Creek Dam story." Ecological Management and Restoration 1, no. 2 (2000): 83–92. http://dx.doi.org/10.1046/j.1442-8903.2000.00028.x.

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Pope, Alasdaire J., and Matthew F. Thirlwall. "Tectonic setting, age, and regional correlation of ultrabasic–ultrapotassic dykes in the northern Purcell Mountains, southeast British Columbia." Canadian Journal of Earth Sciences 29, no. 3 (1992): 523–30. http://dx.doi.org/10.1139/e92-045.

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Ultrabasic–ultrapotassic dykes have been identified in the Toby–Horsethief Creek area of the Purcell Mountains, in southeast British Columbia. The dykes intrude Helikian and Hadrynian strata of the Purcell Anticlinorium, a parautochthonous terrane of folded and faulted sub-lower greenschist-facies metasediments of the ancestral Cordilleran Miogeocline. Structural–stratigraphic relationships indicate that the loci of the dykes are controlled by Helikian to Upper Paleozoic extensional fault systems associated with rifting of the ancestral passive margin.Two dyke types have been distinguished. Gr

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Larson, Kyle P., Raymond A. Price, and Douglas A. Archibald. "Tectonic implications of 40Ar/39Ar muscovite dates from the Mt. Haley stock and Lussier River stock, near Fort Steele, British Columbia." Canadian Journal of Earth Sciences 43, no. 11 (2006): 1673–84. http://dx.doi.org/10.1139/e06-048.

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The Mt. Haley and Lussier River stocks are located northeast of Cranbrook, B.C. near the south end of the Western Main Ranges of the Southern Canadian Rocky Mountains. Both are multiphase, potassium-feldspar porphyritic monzonite plutons that intrude lower Paleozoic miogeoclinal strata. They crosscut and thermally overprint the Lussier River fault and the thrust and fold structures in the east flank of the Purcell anticlinorium and the west limb of the Porcupine Creek anticlinorial fan structure. Muscovite from the Mt. Haley stock yielded a 40Ar/39Ar plateau age of 108.2 ± 0.7 Ma (2σ), and a s

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Hall, Russell L. "New, biostratigraphically significant ammonites from the Jurassic Fernie Formation, southern Canadian Rocky Mountains." Canadian Journal of Earth Sciences 43, no. 5 (2006): 555–70. http://dx.doi.org/10.1139/e06-004.

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Jurassic ammonites described here for the first time come from numerous localities in the Fernie Formation in the Foothills and Front Ranges of the Rocky Mountains of north- and south-eastern British Columbia and central- and south-western Alberta, and provide useful new age data for several members of the formation. The occurrence of Orthodactylites sp. in the uppermost beds of the Red Deer Member indicates this unit extends upwards into the basal Toarcian, which will be helpful in the search for carbon-isotope excursions associated with the early Toarcian anoxic event. The presence of Hettan

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Lyman, R. Lee. "Paleoecological implications of the first prehistoric record of water vole (Microtus richardsoni) from Washington state, USA." Quaternary Research 92, no. 2 (2019): 381–87. http://dx.doi.org/10.1017/qua.2019.15.

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AbstractRemains of the North American water vole (Microtus richardsoni) have previously been recovered from late Pleistocene and Holocene deposits in southwestern Alberta, western Montana, and north-central Wyoming. All are within the historically documented modern range of the metapopulation occupying the Rocky Mountains; no ancient remains of this large microtine have previously been reported from the metapopulation occupying the Cascade Range. Four lower first molar specimens from the late Holocene Stemilt Creek Village archaeological site in central Washington here identified as water vole

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Gröcke, Darren R. "Distribution of C3 and C4 Plants in the Late Pleistocene of South Australia Recorded by Isotope Biogeochemistry of Collagen in Megafauna." Australian Journal of Botany 45, no. 3 (1997): 607. http://dx.doi.org/10.1071/bt96040.

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Stable carbon-isotope analyses (expressed as a 13C:12C ratio relative to that of a standard: δ13C) on fossilised collagenic material in megafaunal bones can provide information regarding the palaeodiet (e.g. C3 and/or C4 plants) of these animals. Isotope analyses were performed on collagenic material extracted from bones of Sthenurus spp., Diprotodon spp. and Macropus spp. from Cooper Creek, Henschke Cave, Baldina Creek, Dempsey’s Lake and Rocky River in South Australia. The percentage of trees and shrubs estimated from palaeofloral records in south-eastern Australia and the dietary preference

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Bassett, Kari N., and Karen L. Kleinspehn. "Early to middle Cretaceous paleogeography of north-central British Columbia: stratigraphy and basin analysis of the Skeena Group." Canadian Journal of Earth Sciences 34, no. 12 (1997): 1644–69. http://dx.doi.org/10.1139/e17-132.

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The Lower–middle Cretaceous Skeena Group records the Early Cretaceous evolution of the southern margin of the Jura-Cretaceous Bowser basin in north-central British Columbia. We formalize Skeena Group nomenclature and present interpretations of three distinct paleogeographic and tectonic phases. During the first phase (Neocomian–Aptian), Skeena deposition was limited to a restricted tidal basin represented by Laventie Formation black-shale deposits, surrounded by coal-swamp deltas of the lower Bulkley Canyon Formation. The lower Skeena Group, correlated to the McEvoy Formation (Bowser Lake Grou

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Viney, Mike, Robert D. Hickey, and George E. Mustoe. "A Silicified Carboniferous Lycopsid Forest in the Colorado Rocky Mountains, USA." Geosciences 9, no. 12 (2019): 510. http://dx.doi.org/10.3390/geosciences9120510.

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The 1930 discovery of Carboniferous lycopsid fossils in south central Colorado resulted in the naming of a new species of scale tree, Lepidodendron johnsonii (=Lepidophloios johnsonii (Arnold) DiMichele). Cellular structures of L. johnsonii axes and periderm are preserved in silica—an unusual mode of fossil preservation for Pennsylvanian lycopsid plant remains. The early reports on the Trout Creek lycopsid fossils focused on taxonomic and paleobotanical aspects. Our 2019 reinvestigation of the locality produced many new specimens and a wealth of new data from a variety of analytical methods. O

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Shaw, Robert P., and Roger D. Morton. "Gold mineralization in Lower Cambrian McNaughton Formation, Athabasca Pass, Canadian Rocky Mountains: structural, mineralogical, and temporal relationships." Canadian Journal of Earth Sciences 27, no. 4 (1990): 477–93. http://dx.doi.org/10.1139/e90-044.

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Gold-bearing quartz veins were recently discovered in archimetamorphic quartzite–rudite and quartzite–pelite sequences of the Lower Cambrian McNaughton Formation in the main ranges of the central Canadian Rocky Mountains. There are two distinct vein types: an early syntectonic, syn- to postmetamorphic, auriferous, bedding-parallel type, generated during repeated northeast-directed compressive tectonism; and a late, postpenetrative deformational discordant type, which contains only minor gold (<500 ppb Au). Gold emplacement and discordant veining were confined to the onset of late compressio

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Evenchick, Carol A., Hubert Gabrielse, and David Snyder. "Crustal structure and lithology of the northern Canadian Cordillera: alternative interpretations of SNORCLE seismic reflection lines 2a and 2b." Canadian Journal of Earth Sciences 42, no. 6 (2005): 1149–61. http://dx.doi.org/10.1139/e05-009.

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Seismic reflectors at shallow crustal levels recorded in SNORCLE (Slave Northern Cordillera Lithospheric Evolution) lines 2a and 2b in the northern Canadian Cordillera can be reconciled with many stratigraphic and structural elements known from geological mapping. Clearly evident examples are the crustal penetrating, Northern Rocky Mountain Trench (NRMT) Fault, the several kilometres thin slices of Slide Mountain (Sylvester Allochthon) and Cache Creek terranes, and the northward dipping Hotailuh Fault. Interpretations of lithological successions and structures at deeper crustal levels are mo

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Klootwijk, C. T. "Carboniferous palaeomagnetism of the Rocky Creek Block, northern Tamworth Belt, and the New England pole path." Australian Journal of Earth Sciences 49, no. 2 (2002): 375–405. http://dx.doi.org/10.1046/j.1440-0952.2002.00924.x.

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Huntley, John Warren, James D. Schiffbauer, Teresa D. Avila, and Jesse S. Broce. "Ecophenotypy, temporal and spatial fidelity, functional morphology, and physiological trade-offs among intertidal bivalves." Paleobiology 44, no. 3 (2018): 530–45. http://dx.doi.org/10.1017/pab.2018.14.

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AbstractEcophenotypic variation in populations is driven by differences in environmental variables. In marine environments, ecophenotypic variation may be caused by differences in hydrodynamic conditions, substrate type, water depth, temperature, salinity, oxygen concentration, and habitat heterogeneity, among others. Instances of ecophenotypic variation in modern and fossil settings are common, but little is known about the influences of time averaging and spatial averaging on their preservation. Here we examine the shell morphology of two adjacent populations, both live collected and death a

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Remus, David, and Karen Tindale. "THE PLEASANT CREEK ARCH, ADAVALE BASIN, A MID DEVONIAN TO MID CARBONIFEROUS THRUST SYSTEM." APPEA Journal 28, no. 1 (1988): 208. http://dx.doi.org/10.1071/aj87017.

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Interpretation of recently acquired multifold seismic data has led to a reappraisal of the structural evolution of the Adavale Basin with particular reference to the Pleasant Creek Arch.The Basin initially formed as a back arc basin to the west of the Anakie/Nebine volcanic arc. Three stages of tectonic evolution are recognised; rifting, extension and convergence. The Pleasant Creek Arch represents a foreland fold belt cratonward of the major convergent margin deformational zone.The model proposed for the development of the Pleasant Creek Arch is a buried to weakly emergent foreland thrust sys

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Gal, L. P., and E. D. Ghent. "Metamorphism in the Solitude Range, southwestern Rocky Mountains, British Columbia: comparison with adjacent Omineca Belt rocks and tectonometamorphic implications for the Purcell Thrust." Canadian Journal of Earth Sciences 27, no. 11 (1990): 1511–20. http://dx.doi.org/10.1139/e90-161.

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Rocks of the Solitude Range, British Columbia, have been metamorphosed from chloritoid–chorite-zone to kyanite-zone conditions. The grade of metamorphism increases southwestward toward the Rocky Mountain Trench (RMT) and the Omineca Belt. Isograds crosscut lithologies and trend more northerly than deformation 2 (D2) structures and the RMT. They are thought to have been quenched syn- to post-D2. Pelitic (Mahto Formation) and calc-pelitic (Tsar Creek unit) rocks contain assemblages that reflect the increase in metamorphic grade. Physical conditions of metamorphism are estimated to be approximate

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Sawicki, Oswald, and Derald G. Smith. "Glacial Lake Invermere, upper Columbia River valley, British Columbia: a paleogeographic reconstruction." Canadian Journal of Earth Sciences 29, no. 4 (1992): 687–92. http://dx.doi.org/10.1139/e92-059.

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Terraces of thick lacustrine silt and deltaic gravel flank parts of the valley floor of the Rocky Mountain Trench between Skookumchuck and Donald, British Columbia. These indicate the presence of former Late Wisconsinan glacial Lake Invermere, which at its maximum extent occupied the Rocky Mountain Trench from Bluewater Creek, 6 km north of Donald, to 7 km north of Skookumchuck. The lake was 210 km long, an average of 2.5 km wide by 100 m deep, and had an area of 530 km2. Retreating glacier ice is interpreted to have formed a dam at the northern end of the lake, and blockage to the south resul

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Ashiq, Muhammad, John C. Doering, and Takashi Hosoda. "Bed-load transport model based on fractional size distribution." Canadian Journal of Civil Engineering 33, no. 1 (2006): 69–80. http://dx.doi.org/10.1139/l05-086.

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Two models based on the fractional size distribution approach, used in conjunction with the excess discharge theory, have been developed by using bed-load data collected from the Roaring River (Rocky Mountain National Park, Colorado) during the summer of 1995. The first model is based on the critical discharge value of individual fractional (IF) sizes, IF model (for log-normal and nonlog-normal size distribution modes), while the other is based on critical discharge value for total (combined) sizes, total fractional (TF) sizes model (for log-normal and nonlog-normal size distribution modes). T

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Minshall, G. Wayne, Evelyn Hitchcock, and James R. Barnes. "Decomposition of Rainbow Trout (Oncorhynchus mykiss) Carcasses in a Forest Stream Ecosystem Inhabited only by Nonanadromous Fish Populations." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 2 (1991): 191–95. http://dx.doi.org/10.1139/f91-026.

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The overall dynamics of rainbow trout (Oncorhynchus mykiss) carcass decomposition in a woodland stream ecosystem was examined in two experiments conducted in the West Fork of Mink Creek, Idaho: one during winter–spring (mean water temperature 4.2 °C) and one during summer (mean water temperature 8.6 °C). Relative weight loss (%AFDW) from fish during both periods was essentially constant. In spring, mean daily loss per day was 1.5%. Although this rate is comparable with the decay of high-quality ("fast") leaves, it took much longer than expected (> 120 d) for the even higher quality fish pro

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Kovanen, D. J., D. J. Easterbrook, and P. A. Thomas. "Holocene eruptive history of Mount Baker, Washington." Canadian Journal of Earth Sciences 38, no. 9 (2001): 1355–66. http://dx.doi.org/10.1139/e01-025.

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New radiocarbon dates associated with volcanic ashes and lahars improve our understanding of the volcanic activity of Mount Baker, a 3284 m-high, andesitic stratovolcano in the North Cascades, Washington. The geologic record shows that during the Holocene, four ashes and at least seven lahars were deposited on the flanks of Mount Baker and in the nearby North Cascades. Here, we document the ages of three previously undated ashes, the Schriebers Meadow scoria, the Rocky Creek ash, and the Cathedral Crag ash. Because Mount Baker lies at the head of the Nooksack drainage, eruptive activity may in

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Arkush, Brooke S., and Denise Arkush. "Aboriginal plant use in the central Rocky Mountains: Macrobotanical records from three prehistoric sites in Birch Creek Valley, eastern Idaho." North American Archaeologist 42, no. 1 (2020): 66–108. http://dx.doi.org/10.1177/0197693120967005.

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Recent excavations at three prehistoric sites in eastern Idaho recovered a moderate amount of culturally-introduced macrobotanical remains, including mountain ball and prickly pear cactus, goosefoot, sunflower, and tobacco, all of which came from contexts dating between 1500 B.C. and A.D. 1000. Within the greater region, cactus, goosefoot, and sunflower were first used by people between ca. 11,000 and 8500 B.C., whereas the archaeobotanical record for tobacco dates back to 10,300 B.C. The Birch Creek Valley data set allows us to explore aspects of local site function and settlement practices,

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Rahman, S., L. C. Munn, R. Zhang, and G. F. Vance. "Rocky Mountain forest soils: Evaluating spatial variability using conventional statistics and geostatistics." Canadian Journal of Soil Science 76, no. 4 (1996): 501–7. http://dx.doi.org/10.4141/cjss96-062.

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Spatial variability of soils is a landscape attribute which soil scientists must identify and understand if they are to construct useful soils maps. This paper describes the spatial variability of soils in a forested watershed in the Medicine Bow Mountains, Wyoming, using both conventional statistics and geostatistics. Principle Components Analysis indicated that flow accumulation and aspect were the two terrain attributes that most economically described terrain variability. Thickness of A and B horizons, organic carbon and solum coarse fragments were variable in the study area (CVs of 40 to

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Fedortchouk, Yana, and William LeBarge. "Sources of placer platinum in Yukon: provenance study from detrital minerals." Canadian Journal of Earth Sciences 45, no. 8 (2008): 879–96. http://dx.doi.org/10.1139/e08-032.

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Source rocks for the platinum group minerals (PGM), historically reported in a number of Yukon placers, remain either unknown or poorly understood. A study of heavy-mineral samples from five creeks draining bedrock in west and central Yukon was undertaken to confirm the presence of placer platinum, to determine which mafic–ultramafic rock is the source of PGM in Kluane area, southern Yukon, and to explain platinum occurrences in Canadian and Florence creeks, central Yukon, where no known mafic–ultramafic rocks are present. Diverse composition of chromian spinel and clinopyroxenes from three cr

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Nagesan, Ramon S., James A. Campbell, Jason D. Pardo, Kendra I. Lennie, Matthew J. Vavrek, and Jason S. Anderson. "An Early Cretaceous (Berriasian) fossil-bearing locality from the Rocky Mountains of Alberta, yielding the oldest dinosaur skeletal remains from western Canada." Canadian Journal of Earth Sciences 57, no. 4 (2020): 542–52. http://dx.doi.org/10.1139/cjes-2019-0166.

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Western North America preserves iconic dinosaur faunas from the Upper Jurassic and Upper Cretaceous, but this record is interrupted by an approximately 20 Myr gap with essentially no terrestrial vertebrate fossil localities. This poorly sampled interval is nonetheless important because it is thought to include a possible mass extinction, the origin of orogenic controls on dinosaur spatial distribution, and the origin of important Upper Cretaceous dinosaur taxa. Therefore, dinosaur-bearing rocks from this interval are of particular interest to vertebrate palaeontologists. In this study, we repo

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McMechan, M. E. "Structural geometry in the Carbon Creek area of the Rocky Mountain Fold and Thrust Belt, northeastern British Columbia." Bulletin of Canadian Petroleum Geology 50, no. 3 (2002): 407–18. http://dx.doi.org/10.2113/50.3.407.

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Roberts, J., X. Wang, and M. Fanning. "Stratigraphy and correlation of Carboniferous ignimbrites, Rocky Creek region, Tamworth Belt, Southern New England Orogen, New South Wales*." Australian Journal of Earth Sciences 50, no. 6 (2003): 931–54. http://dx.doi.org/10.1111/j.1400-0952.2003.01035.x.

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Kelley, Karen D., and Steve Ludington. "Cripple Creek and other alkaline-related gold deposits in the southern Rocky Mountains, USA: influence of regional tectonics." Mineralium Deposita 37, no. 1 (2002): 38–60. http://dx.doi.org/10.1007/s00126-001-0229-4.

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Stock, A. J., and R. A. Gorley. "OBSERVATIONS ON A TRIAL OF BROADCAST BURNING TO CONTROL AN INFESTATION OF THE MOUNTAIN PINE BEETLE DENDROCTONUS PONDEROSAE." Canadian Entomologist 121, no. 6 (1989): 521–23. http://dx.doi.org/10.4039/ent121521-6.

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The mountain pine beetle, Dendroctonus ponderosae Hopk., causes extensive mortality of lodgepole pine, Pinus contorta var. latifolia Engelm., throughout western North America (Van Sickle 1982). The Prince Rupert Forest Region, in the northwest of British Columbia, initiated an aggressive beetle management program in 1981. Logging of infested stands, and winter felling and burning of individual infested trees are the most common direct control techniques.The “Bristol Lake” infestation developed in the Bulkley Forest District, approximately 55 km northwest of Smithers, B.C., on a steep rocky rid

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