Composition, radioisotopic ages, and potential significance of an altered volcanic ash (bentonite) from the Upper Cretaceous Judith River Formation, Dinosaur Provincial Park, southern Alberta, Canada

Alberta Department of Recreation and Parks, 1979 Altaner, 1984, Model for K-bentonite formation: evidence from zoned K-bentonites in the disturbed belt, Montana, Geology, 12, 412, 10.1130/0091-7613(1984)12<412:MFKFEF>2.0.CO;2 Amajor, 1980, Subsurface correlation of bentonite beds in the Lower Cretaceous Viking Formation of south-central Alberta, Bulletin of Canadian Petroleum Geology, 28, 149 Anderson, 1984, Sinking of volcanic ash in uncompacted sediment in Williams Lake, Washington, Science, 225, 505, 10.1126/science.225.4661.505 Armstrong, 1988, Mesozoic and Early Cenozoic magmatic evolution of the Canadian Cordillera, Geological Society of America Special Paper, 218, 55, 10.1130/SPE218-p55 Behrensmeyer, 1982, Time resolution in fluvial vertebrate assemblages, Paleobiology, 8, 211, 10.1017/S0094837300006941 Béland, 1978, Paleoecology of Dinosaur Provincial Park (Cretaceous), Alberta, interpreted from the distribution of articulated vertebrate remains, Canadian Journal of Earth Sciences, 15, 1012, 10.1139/e78-109 Béland, 1979, Ectothermy in dinosaurs: paleoecological evidence from Dinosaur Provincial Park, Alberta, Canadian Journal of Earth Sciences, 16, 250, 10.1139/e79-024 Bence, 1968, Empirical correction factors for the electron microanalysis of silicates and oxides, Journal of Geology, 76, 382, 10.1086/627339 Berg, 1969, Bentonite in Montana, Bulletin of the State of Montana Bureau of Mines and Geology, 74 Beveridge, 1956, Dating Cordilleran orogenies, Transactions of the Royal Society of Canada, 50, 19 Binda, 1969, Provenance of the Upper Cretaceous Kneehills Tuff, southern Alberta, Canadian Journal of Earth Sciences, 6, 510, 10.1139/e69-048 Brinkman, 1987, Paleoecology of aquatic communities of the Judith River Formation of Dinosaur Provincial Park: evidence from stratigraphic distributions, 3, 30 Brinkman, 1990, Paleoecology of the Judith River Formation (Campanian) of Dinosaur Provincial Park, Alberta, Canada: evidence from vertebrate microfossil localities, Palaeogeography, Palaeoclimatology, Palaeoecology, 78, 10.1016/0031-0182(90)90203-J Burnham, 1986, Forest litter preserved by volcanic activity at El Chichón, Mexico: a potentially accurate record of the pre-eruption vegetation, Palaios, 1, 158, 10.2307/3514509 Byrne, 1955, Bentonite in Alberta, Report of the Research Council of Alberta, 71 Byrne, 1959, The clay mineralogy and chemistry of the Bearpaw Formation of southern Albeta, Bulletin of the Research Council of Alberta, 4 Caldwell, 1984, Early Cretaceous transgressions and regressions in the southern interior plains, 9, 173 Carmichael, 1968, Analytical data on the U.S. Geological Survey standard rocks, Chemical Geology, 3, 59, 10.1016/0009-2541(68)90013-2 Chadwick, 1981, Chronology and structural setting of volcanism in southwestern and central Montana, 301 Church, 1972, Geology of the Buck Creek area, 353 Cornell, 1983, Computer simulation of transport and deposition of the Campanian Y-5 ash, Journal of Volcanology and Geothermal Research, 17, 89, 10.1016/0377-0273(83)90063-X Currie, 1985, Small theropods of Dinosaur Provincial Park, Alberta, Geological Society of America, Program with Abstracts, 17, 215 Currie, 1986, Dinosaur fauna, 17 Currie, 1984, Mass death of a herd of ceratopsian dinosaurs, 61 Dalrymple, 1981, Irradiation of samples for 40Ar/39Ar dating using the Geological Survey TRIGA reactor, United States Geological Survey, Professional Paper, 1176 Dalrymple, 1969 Deer, 1962 Deino, 1985, Improved methods of K-Ar age and error calculation, EOS Transactions, 64, 906 Dickinson, 1976, Sedimentary basins developed during evolution of Mesozoic-Cenozoic arc-trench system in western North America, Canadian Journal of Earth Sciences, 13, 1268, 10.1139/e76-129 Dodson, 1971, Sedimentology and taphonomy of the Oldman Formation (Campanian), Dinosaur Provincial Park, Alberta (Canada), Palaeogeography, Palaeoclimatology, Palaeoecology, 10, 21, 10.1016/0031-0182(71)90044-7 Dodson, 1983, A faunal review of the Judith River (Oldman) Formation, Dinosaur Provincial Park, Alberta, The Mosasaur, 1, 89 Dodson, 1987, Microfaunal studies of dinosaur paleoecology, Judith River Formation of southern Alberta, 3, 70 Doyle, 1983, The hydraulic equivalence of mica, Journal of Sedimentary Petrology, 53, 643 1988 Eberth, 1990, Stratigraphy and sedimentology of vertebrate microfossil localities in uppermost Judith River Formation (Campanian) of Dinosaur Provincial Park, south-central Alberta, Canada, Palaeogeography, Palaeoclimatology, Palaeoecology, 78, 10.1016/0031-0182(90)90202-I Eberth, D. A., Braman, D. R., Tokaryk, T. T. (in press [a]). Stratigraphy, sedimentology and vertebrate paleontology of the Judith River Formation (Campanian) near Muddy Lake, west-central Saskatchewan. Bulletin of Canadian Petroleum Geology. Eberth, D. A., Thomas, R. G. & Deino, A. (in press [b]). Preliminary K-Ar dates from bentonites in the Judith River and Bearpaw Formations (Upper Cretaceous) of Dinosaur Provincial Park, southern Alberta, Canada. In Aspects of nonmarine Cretaceous geology (eds Mateer, N. & Chen, P. J.), (Proceedings of a Conference on Nonmarine Cretaceous Correlations, Urumqi, China, 1987). Eisbacher, 1974, Paleodrainage pattern and late-orogenic basins of the Canadian Cordillera, 22, 143 Elder, 1988, Geometry of Upper Cretaceous bentonite beds: implications about volcanic source areas and paleowind patterns, Western Interior, United States, Geology, 16, 835, 10.1130/0091-7613(1988)016<0835:GOUCBB>2.3.CO;2 Fisher, 1984 Floyd, 1975, Magma type and tectonic setting discrimination using immobile elements, Earth and Planetary Science Letters, 27, 211, 10.1016/0012-821X(75)90031-X Folinsbee, 1960, Potassium-Argon time scale, 25 Folinsbee, 1961, Potassium-Argon dates of Upper Cretaceous ash falls, Alberta, Canada, Annals of the New York Academy of Sciences, 91, 352, 10.1111/j.1749-6632.1961.tb35475.x Folinsbee, 1963, Dating of volcanic ash beds (bentonites) by the K-Ar method, Nuclear Geophysics, Nuclear Science Series, Report, 38, 70 Folinsbee, 1964, Radiometric dating of the Bearpaw Sea, Bulletin of the American Association of Petroleum Geologists, 48, 525 Folinsbee, 1965, Late Cretaceous radiometric dates from the Cypress Hills of Western Canada, 162 Folk, 1980 Goddard, 1980 Goodwin, 1988 Goodwin, 1989, The first radiometric ages from the Judith River Formation (Upper Cretaceous), Hill County, Montana, Canadian Journal of Earth Sciences, 26, 1384, 10.1139/e89-118 Gray, 1975, Color changes in pollen and spores: a review, Geological Society of America Bulletin, 86, 1019, 10.1130/0016-7606(1975)86<1019:CCIPAS>2.0.CO;2 Grim, 1978, 24 Gwinn, 1965, Intertongued Upper Cretaceous volcanic and nonvolcanic rocks, central-western Montana, Geological Society of American Bulletin, 76, 1125, 10.1130/0016-7606(1965)76[1125:IUCVAN]2.0.CO;2 Harvey, 1973, An accurate fusion method for the analysis of rocks and chemically related materials by X-ray fluorescence spectrometry, X-ray Spectrometry, 2, 33, 10.1002/xrs.1300020109 Hess, 1986, Kinetics of Ar isotopes during neutron irradiation: 39Ar loss from minerals as a source of error in 40Ar/39Ar dating, Chemical Geology, 59, 223, 10.1016/0168-9622(86)90073-4 Horner, 1984, The nesting behavior of dinosaurs, Scientific American, 250, 130, 10.1038/scientificamerican0484-130 Horner, 1979, Nest of juveniles provides evidence of family structure among dinosaurs, Nature, 282, 296, 10.1038/282296a0 Huff, 1983, Correlation of middle Ordovician K-bentonites based on chemical fingerprinting, Journal of Geology, 91, 657, 10.1086/628818 Hyndman, 1975, Boulder batholith: a result of emplacement of a block detached from the Idaho batholith infrastructure?, Geology, 3, 401, 10.1130/0091-7613(1975)3<401:BBAROE>2.0.CO;2 Jack, 1969, The chemical ‘fingerprinting’ of acid volcanic rocks, California Division of Mines and Geology, Short Contributions, 100, 17 Kauffman, 1977, Geological and biological overview: Western Interior Cretaceous Basin, 14, 75 Klepper, 1957, Geology of the Elkhorn Mountains, Jefferson and Broadwater counties, Montana, United States Geological Survey Professional Paper, 292 Koster, 1984 Koster, 1987, Vertebrate taphonomy applied to the analysis of ancient fluvial systems, 39, 159 Koster, 1987, Upper Cretaceous coastal plain sediments at Dinosaur Provincial Park, southeast Alberta, 9 Koster, 1987 Laporte, 1980, Tracks and substrate reworking by terrestrial vertebrates in Quaternary sediments of Kenya, Journal of Sedimentary Petrology, 50, 1337 Lerbekmo, 1963, Petrology of the Belly River Formation, southern Alberta Foothills, Sedimentology, 2, 54, 10.1111/j.1365-3091.1963.tb01200.x Lerbekmo, 1964, Heavy minerals and the Cretaceous-Tertiary boundary in Alberta, Canada, 137 Lerbekmo, 1968, Chemical and modal analysis of some Upper Cretaceous and Paleocene bentonites from western Alberta, Canadian Journal of Earth Sciences, 5, 1505, 10.1139/e68-147 Lillegraven, 1986, Fossil mammals from the “Mesaverde” Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River Basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal “Ages”, American Museum Novitates, 2840, 1 Lloyd, 1982, The mid-Cretaceous Earth: paleogeography; ocean circulation and temperature; atmospheric circulation, Journal of Geology, 90, 393, 10.1086/628693 Lockley, 1986, The paleobiological and paleoenvironmental importance of dinosaur footprints, Palaios, 1, 37, 10.2307/3514457 Lorenz, 1984, Geology of the Two Medicine Formation and the sedimentology of a dinosaur nesting ground, 175 Macdonald, 1987, An evaluation of the coal resources of the Belly River Group, to a depth of 400 m in the Alberta Plains, Open File Report 1987–8 Mack, 1989, Provenance of post-Wapiabi sandstones and its implications for Campanian to Paleocene tectonic history of the southern Canadian Cordillera, Canadian Journal of Earth Sciences, 26, 665, 10.1139/e89-057 Maiklem, 1965, A study of the clays from Upper Cretaceous bentonites and shales in Alberta, The Canadian Mineralogist, 8, 354 Majorowicz, 1985, The paleogeothermal and present thermal regimes of the Alberta Basin and their significance for petroleum occurrences, Bulletin of Canadian Petroleum Geology, 33, 12 McGookey, 1972, Cretaceous System, 190 McLean, 1971, Stratigraphy of the Upper Cretaceous Judith River Formation in the Canadian Great Plains, Saskatchewan Research Council, Geology Division Report, 11 Misko, 1979, The petrology of sands in the uppermost Cretaceous and Palaeocene of southern Saskatchewan: a study of compositon influenced by grain size, source area, and tectonics, Canadian Journal of Earth Sciences, 16, 38, 10.1139/e79-004 Montanari, 1988, Radioisotopic dating of the Eocene-Oligocene boundary in the pelagic sequence of the Apennines Montanari, 1985, Radiometric time scale for the upper Eocene and Oligocene based on K/Ar and Rb/Sr dating of volcanic biotites from the pelagic sequence of Gubbio, Italy, Geology, 13, 596, 10.1130/0091-7613(1985)13<596:RTSFTU>2.0.CO;2 Montellano, 1986 Mudge, 1968, Provenance of igneous rocks in Cretaceous conglomerates in northwestern Montana, United States Geological Survey, Professional Paper, 600-D, D137 Nascimbene, 1965, Bentonites and the geochronology of the Bearpaw Sea, Bulletin of Canadian Petroleum Geology, 13, 537 Nurkowski, 1984, Coal quality, coal rank variation and its relation to reconstructed overburden, Upper Cretaceous and Tertiary Plains coals, Alberta, Canada, Bulletin of the American Association of Petroleum Geologists, 68, 285 Pearce, 1984, Trace element discrimination diagrams for the tectonic interpretation of granitic rocks, Journal of Petrology, 25, 956, 10.1093/petrology/25.4.956 Randle, 1971, Geochemical and petrological characterization of ash samples from Cascade Range volcanoes, Quaternary Research, 1, 261, 10.1016/0033-5894(71)90046-9 Reeves, 1972, Factors controlling the deposition of some phosphate bearing strata from Jordan, Economic Geology, 66, 451, 10.2113/gsecongeo.66.3.451 Ritchie, 1960, The Kneehills Tuff, Journal of the Alberta Society of Petroleum Geologists, 8, 339 Robinson, 1981, XRF determination of 19 trace elements in International Geochemical Reference Samples, Geostandards Newsletter, V, 175, 10.1111/j.1751-908X.1981.tb00324.x Robinson, 1963, Geology of the Three Forks Quadrangle, Montana, United States Geological Survey, Professional Paper, 370 Robinson, 1967, Upper Cretaceous volcanic glass from Western Montana, Geological Society of America Bulletin, 78, 601, 10.1130/0016-7606(1967)78[601:UCVGFW]2.0.CO;2 Robinson, 1968, Overlapping plutonism, volcanism, and tectonism in the Boulder Batholith region, western Montana, Studies in volcanology. Geological Society of America Memoir, 116, 557, 10.1130/MEM116-p557 Roen, 1982, Misuse of the term ‘bentonite’ for ash beds of Devonian age in the Appalachian basin, Geological Society of America Bulletin, 93, 921, 10.1130/0016-7606(1982)93<921:MOTTBF>2.0.CO;2 Russell, 1970, Correlation of the Upper Cretaceous Montana Group between southern Alberta and Montana, Canadian Journal of Earth Sciences, 7, 1099, 10.1139/e70-103 Russell, 1940, Geology of the southern Alberta Plains, Geological Survey of Canada Memoir, 221 Sahni, 1972, The vertebrate fauna of the Judith River Formation, Montana, Bulletin of the American Museum of Natural History, 147, 323 Samson, 1987, Calibration of the interlaboratory 40Ar/39Ar dating standard, MMhb-1, Chemical Geology, 66, 27 Sanderson, 1931, Upper Cretaceous volcanic ash beds in Alberta, Transactions of the Royal Society of Canada, 25, 61 Scafe, 1975, Alberta bentonites, Economic Geology Report of the Alberta Research Council, 2 Scott, 1968, Geological and engineering aspects of Upper Cretaceous shales in western Canada, Geological Survey of Canada Paper, 66-37 Shafiqullah, 1964, Geochronology of Cretaceous-Tertiary boundary, Alberta, Canada, 1 Shaw, 1974, An application of factor analysis to basic rock geochemistry, Bulletin Volcanologique, 38, 1070, 10.1007/BF02597106 Smedes, 1973, Regional setting and general geology of the Boulder Batholith, Montana, A1 Souther, 1977, Volcanism and tectonic environments in the Canadian Cordillera — a second look, 16, 3 Steiger, 1978, Subcommission on Geochronology: convention on the use of decay constants in geochronology and cosmochronology, 6, 67 Steven, 1972, Upper Cretaceous and Cenozoic igneous rocks, 229 Streckeisen, 1979, Classification and nomenclature of volcanic rocks, lamprophyres, carbonatites, and melilitic rocks: recommendations and suggestions of the IUGS Subcommission on the Systematics of Igneous Rocks, Geology, 7, 331, 10.1130/0091-7613(1979)7<331:CANOVR>2.0.CO;2 Thomas, 1987, Inclined heterolithic stratification—terminology, description, interpretation and significance, Sedimentary Geology, 53, 123, 10.1016/S0037-0738(87)80006-4 Tilling, 1968, K-Ar ages and time span of emplacement of the Boulder batholith, Montana, American Journal of Science, 266, 671, 10.2475/ajs.266.8.671 Viele, 1965, Montana Group stratigraphy, Lewis and Clark County, Montana, Bulletin of the American Association of Petroleum Geologists, 49, 379 Visser, 1986 Weaver, 1963, Interpretive value of heavy minerals from bentonites, Journal of Sedimentary Petrology, 33, 343 Westgate, 1975, Wascana Creek Ash (Pleistocene) in southern Saskatchewan: fission track age, Geological Survey of Canada Paper, 75–1, 119 Winchester, 1977, Geochemical discrimination of different magma series and their differentiation products using immobile elements, Chemical Geology, 20, 325, 10.1016/0009-2541(77)90057-2 Wood, 1985 Wood, 1989, Alluvial architecture of the Upper Cretaceous Judith River Formation, Dinosaur Provincial Park, Alberta, Canada, Bulletin of Canadian Petroleum Geology, 37, 169 Wood, 1988, Fluvial processes and vertebrate taphonomy: the Upper Cretaceous Judith River Formation, south-central Dinosaur Provincial Park, Alberta, Canada, Palaeogeography, Palaeoclimatology, Palaeoecology, 66, 127, 10.1016/0031-0182(88)90085-5