• Soreghan, G.S., Heavens, N.G., Pfeifer, L.S., and Soreghan, M.J., 2023, Dust and loess as archives and agents of climate and climate change in the late Paleozoic Earth system, in Lucas, S. G., DiMichele, W. A., Opluštil, S. and Wang, X. (eds) Ice Ages, Climate Dynamics and Biotic Events: the Late Pennsylvanian World. Geological Society, London, Special Publications, 535, 10.1144/SP535-2022-208 
  • Bonar, A.L., Soreghan, G.S., and Elwood Madden, M.E., 2023, Assessing weathering, pedogenesis, and silt generation in granitoid-hosted soils from contrasting hydroclimates: Journal of Geophysical Research Earth Surface, 10.1029/2023JF007095
  • Dangwal, D., Behm, M., Chen, X., and Soreghan, G.S., 2023, Imaging an enigmatic paleovalley with passive seismic methods (Unaweep Canyon, Colorado, United States): The Seismic Record, v. 3, p. 116-124.
  • Webb, N.D.S., Regmi, N.R., Soreghan, G.S., Elwood Madden, A., Sylvester, S., Cartegena Colon, F., Demirel-Floyd, C., and Elwood Madden, M.E., 2022, Effects of mass wasting on the physiochemical properties of fluvial sediments in Puerto Rico following Hurricane Maria: Journal of Geophysical Research Earth Surface, 10.1029/2021JF006509
  • Soreghan, G.S., Pfeifer, L.S., Sweet, D.E., and Heavens, N.G., 2022, Detecting upland glaciation in Earth’s pre-Pleistocene record: Frontiers in Earth Science, 10.3389/feart.2022.904787
  • McGlannan, A.J., Bonar, A.L., Pfeifer, L.S., Steinig, S., Valdes, P., Adams, S., Duarte, D., Milad, B., Cullen, A., and Soreghan, G.S., 2022, An eolian dust origin for clastic fines of Devono-Mississippian mudrocks of the greater North American Midcontinent: Journal of Sedimentary Research, v. 92, p. 1186-1206.
  • Joo, Y.J., Sim, M.S., Elwood Madden, M.E., and Soreghan, G.S., 2022, Significance of the terrestrial sink in the biogeochemical sulfur cycle: Geophysical Research Letters, v. 49.
  • Kushner, B.E., Soreghan, G.S., and Soreghan, M.J., 2022, Late Paleozoic cratonal sink: Distally sourced sediment filled the Anadarko Basin (USA) from multiple source regions: Geosphere, 10.1130/GES02489.1.
  • Demirel-Floyd, C., Soreghan, G.S., and Elwood Madden, M.E., 2022, Cyanobacterial weathering in warming periglacial sediments: implications for nutrient cycling and potential biosignatures: Permafrost and Periglacial Processes, v. 33, p. 63-77.
  • Pfeifer, L.S., BIrkett, B.A., Van Den Driessche, J., Pochat, S., and Soreghan, G.S., 2021, Ice-crystal traces imply ephemeral freezing in early Permian equatorial Pangea: Geology, v. 49, p. 1397-1401.
  • Patterson, A., Behm, M., Chwatal, W., Flores-Orozco, A., Wany, Y., and Soreghan, G.S., 2021, Seismic reflection and electrical resistivity imaging support pre-Quaternary glaciation in the Rocky Mountains (Unaweep Canyon, Colorado): Geophysical Research Letters, v. 48. 
  • Pfeifer, L.S., Soreghan, M.J., Feille, K.K., Soreghan, G.S., Weissmann, G.S., Ibarra, R.A., and Stroud, W.A., 2021, Activation of the multicontext model in a field-based program for traditionally underserved students: Journal of Geoscience Education, v.  69, p. 85-95.
  • Pfeifer, L.S., Soreghan, G.S., Pochat, S., Van Den Driessche, J., 2021, Loess in eastern equatorial Pangea archives a dusty atmosphere and possible upland glaciation. GSA Bulletin, v. 133, p. 379-392.
  • Adams, S.M., and Soreghan, G.S., 2020, A test of the efficacy of sand saltation for silt production: Implications for the interpretation of loess: Geology, v. 48, p. 1105-1109.
  • Soreghan, G.S., and 14 coauthors, 2020 Report on ICDP Deep Dust workshops: probing continental climate of the late Paleozoic icehouse-greenhouse transition and beyond: Scientific Drilling, v. 28, p. 93-112.
  • Sardar Abadi, M., Soreghan, G.S., Hinnov, L., Heavens, N.G., and Gleason, J.D., 2020, Atmospheric dust flux in northeastern Gondwana during the peak of the late Paleozoic ice age: GSA Bulletin, https://doi.org/10.1130/B35636.1.
  • Pfeifer, L.S., Hinnov, L.A., Zeeden, C., Rolf, C., Laag, C., and Soreghan, G.S., 2020, Rock magnetic cyclostratigraphy of Permian loess in eastern equatorial Pangea (Salagou Formation, South-Central France). Frontiers in Earth Science, v. 8. p. 241-.
  • Sardar Abadi, M., Owens, J.D., Liu, X., Them, T.R., II, Cui, X., Heavens, N.G., and Soreghan, G.S., 2020, Atmospheric dust stimulated marine primary productivity during Earth’s penultimate icehouse: Geology, v. 48, p. 247-251, https://doi.org/10.1130/G46977.1
  • Oordt, A.J., Soreghan, G.S., Stemmerik, L., and Hinnov, L.A., 2020, A record of dust deposition in northern, mid-latitude Pangaea during peak icehouse conditions of the late Paleozoic ice age: Journal of Sedimentary Research, v. 90, no. 4, p. 337-363.
  • Sardar Abadi, M., Soreghan, G.S., Heavens, N.G., Voeten, D.F.A.E., Ivanova, R.M., 2019, Warm-water carbonates in proximity to Gondwanan ice–sheets:  A record from the Upper Paleozoic of Iran: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 531.
  • Soreghan, G. S., Soreghan, M. J., Heavens, N., 2019, Explosive volcanism as a key driver of the late Paleozoic ice age: Geology, v. 47, p. 600-604.
  • Behm, M., Cheng, F., Patterson, A., Soreghan, G.S., 2019, Passive processing of active nodal seismic data: estimation of VP∕VS ratios to characterize structure and hydrology of an alpine valley infill. Solid Earth, v. 10(4), p. 1337-1354.

  • Joo, Y.J., Soreghan, A.M., Elwood Madden, M.E., Soreghan, G.S., 2018, Quantification of particle shape by an automated image analysis system: a case study in natural sediment samples from extreme climates. Geosciences Journal, v. 22(4), p. 525-532.

  • Soreghan, M.J., Swift, M.M., and Soreghan, G.S, 2018, Provenance of Permian eolian and related strata in the North American Midcontinent: Tectonic and climatic controls on sediment dispersal in western tropical Pangea: Geological Society of America Special Paper, v. 540, p. 1–28.

  • Carvajal, C.P., Soreghan, G.S., Isaacson, P.E., Ma, C., Hamilton, M.A., and Hinnov, L.A., 2018, Atmospheric dust from the Pennsylvanian Copacabana Formation (Bolivia): A high-resolution record of climate and volcanism from northwestern Gondwana: Gondwana Research, v. 58, 105-121.

  • Smith, C., Soreghan, G.S., and Ohta, T., 2018, Scanning Electron Microscope (SEM) microtextural analysis as a paleoclimate tool for fluvial deposits: A modern test: Geological Society of America Bulletin, v. 130, 1256.

  • Joo, Y.J., Elwood Madden, M.E., and Soreghan, G.S., 2018, Anomalously low chemical weathering in fluvial sediment of a tropical watershed (Puerto Rico): Geology, July 10, 2018, 1–4.

  • Marra, K.R., Elwood Madden, M.E., Soreghan, G.S., and Hall, B., 2017, Chemical weathering trends in fine-grained ephemeral stream sediments of the McMurdo Dry Valleys, Antarctica: Geomorphology, v. 281, p. 13-30.

  • Trachtenberg, Z.M., Burns, T., de Beurs, K., Ellis, S.E., Gates, K.K., Hoagland, B.W., Kelly, J.F., Neeson, T.M., Randall, A.R., Schlupp, I., Soppelsa, P.S., and Soreghan, G.S.,  2017, The Anthropocene biosphere: Supporting interdisciplinary inquiry by blogging: Trends in Ecology and Evolution (TREE), v. 32, p. 1-3.
  • Pfeifer, L.S., Soreghan, G.S., Pochat, S., Van Den Driessche, J., and Thomson, S.N., 2016, Rapid Permian exhumation of the Montange Noire metamorphic core complex recorded in provenance of upper Paleozoic clastic strata in the Grassessac-Lodéve basin, France: Basin Research, doi:10.1111/bre.12197
  • Soreghan, G.S., Joo, Y.-J., Elwood Madden, M.E., and Van Deventer, S.C., 2016, Silt production as a function of climate and lithology under simulated comminution: Quaternary International, v. 399, p. 218-227.
  • Joo, Y.-J., Elwood Madden, M.E., and Soreghan, G.S., 2016, Chemical and physical weathering in a hot-arid, tectonically active alluvial system of Anza Borrego Desert California: Sedimentology, v. 63, p. 1065-1083.
  • Soreghan, G.S., Heavens, N.G., Hinnov, L.A., Aciego, S.M., and Simpson, C., 2015, Reconstructing the dust cycle in deep time: the case of the Late Paleozoic icehouse, in Polly, P.D., Head, J.J., and Fox, D.L. (eds.): The Paleontological Society Papers, v. 21, p. 83-120.
  • Sur, S., Owens, J.D., Soreghan, G.S., Lyons, T.W., Raiswell, R., Heavens, N.G., and Mahowald, N.M., 2015, Extreme eolian delivery of reactive iron to late Paleozoic icehouse seas: Geology, doi:10.1130/G37226.1
  • Keiser, L.J., Soreghan, G.S., and Kowalewski, M., 2015, Use of quartz microtextures to assess possible proglacial deposition for the Pennsylvanian-Permian Cutler Formation (Colorado, U.S.A): Journal of Sedimentary Research, v. 85, p. 1310-1322.
  • Soreghan, G.S., Benison, K.C., Foster, T.M., Zambito, J., and Soreghan, M.J., 2015, The paleoclimatic and geochronologic utility of coring red beds and evaporites: A case study from the RKB core (Permian, Kansas, USA): International Journal of Earth Sciences, v. 104, p. 1589-1603.
  • Soreghan, G.S., Sweet, D.E., Thomson, S.N., Kaplan, S.A., Marra, K.R., Balco, G., and Eccles, T.M., 2015, Geology of Unaweep Canyon and its role in the drainage evolution of the northern Colorado Plateau: Geosphere, v. 11, p. 320-341, doi: 10.1130/GES01112.1
  • Marra, K.R., Madden, M.E.E., Soreghan, G.S., and Hall, B.L., 2015, BET surface area distributions in polar stream sediments: Implications for silicate weathering in a cold-arid environment: Applied Geochemistry, v. 52, no. C, p. 31–42, doi: 10.1016/j.apgeochem.2014.11.005
  • Heavens, N.G., Mahowald, N.M., Soreghan, G.S., Soreghan, M.J., and Shields, C.A., 2015, A model-based evalution of tropical climate in Pangaea during the late Palaeozoic icehouse: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 425, no. C, p. 109–127, doi: 10.1016/j.palaeo.2015.02.024
  • Keiser, K.J., Soreghan, G.S., and Joo, Y.-J., 2014, Effects of drying techniques on grain-size analyses of fine-grained sediment: Journal of Sedimentary Research, v. 84, p. 893-896. dii: 10.2110/jsr.2014.68
  • Soreghan, G.S., Sweet, D.E., and Heavens, N.G., 2014, Upland glaciation in tropical Pangaea: geologic evidence and implications for Late Paleozoic climate modeling: Journal of Geology, v. 122, p. 137-163.
  • Foster, T.M., Soreghan, G.S., Soreghan, M.J., Benison, K.C., and Elmore, R.D., 2014, Climatic and palaeogeographic significance of eolian sediment in the Middle Permian Dog Creek Shale (Midcontinent U.S.): Palaeogeography, Palaeoclimatology, Palaeoecology, v. 402, p. 12-29.
  • Soreghan, M.J., Soreghan, G.S., Heavens, N., Link, P.K., and Hamilton, M.A., 2014, Abrupt and high-magnitude changes in atmospheric circulation recorded in the Permian Maroon Formation, tropical Pangaea: Colorado: Geological Society of America Bulletin, doi:10.1130/B30840.1
  • Marra, K.M., Soreghan, G.S., Elwood Madden, M.E., Keiser, L.J., and Hall, B.L., 2014, Trends in grain size and surface area in cold-arid versus warm-semi-arid fluvial systems: Geomorphology, v. 206, p. 483-491.
  • Soreghan, G.S., and Soreghan, M.J., 2013, Tracing Clastic Delivery To the Permian Delaware Basin, U.S.A.: Implications For Paleogeography and Circulation In Westernmost Equatorial Pangea: Journal of Sedimentary Research, v. 83, no. 9, p. 786–802, doi: 10.2110/jsr.2013.63.
  • Seals, S.C., and Soreghan, G.S., 2013, Late Pennsylvanian sedimentation in the western Orogrande basin (New Mexico): “Icehouse” sedimentation and rapid basin subsidence in the southern Ancestral Rocky Mountains: In, Lucas, S., ed., Carboniferous-Permian Transition in Central New Mexico: New Mexico Museum of History and Science Bulletin, v. 59, p. 331-346.
  • Soreghan, G.S., and Sweet, D.E., 2013, New views on Late Paleozoic climate and tectonics in the Ancestral Rocky Mountains, in Abbott, L.D., and Hancock, G.S., eds., Classic Concepts and New Directions: Exploring 125 Years of GSA Discoveries in the Rocky Mountain Region: Geological Society of America Field Guide v. 33, p. 295–330.
  • Giles, J.M., Soreghan, M.J., Benison, K.C., Soreghan, G.S., and, Hasiotis, S.T., 2013, Lakes loess and paleosols in the Permian Wellington Formation of Oklahoma, U.S.A.: Implications for paleoclimate and paleogeography of the midcontinent: Journal of Sedimentary Research, v. 83, p. 825-846.
  • Balco, G., Soreghan, G.S., Sweet, D.E., Marra, K.R., and Biermand, P.R., 2013, Cosmogenic-nuclide burial ages for Pleistocene sedimentary fill in Unaweep Canyon, Colorado, USA: Quaternary Geochronology, v. 18, p. 149-157.
  • Sweet, A.C., Soreghan, G.S., Sweet, D.E., Soreghan, M.J., and Madden, A.S., 2013, Permian dust in Oklahoma: Source and origin for Middle Permian (Flowerpot-Blaine) redbeds in western Tropical Pangaea: Sedimentary Geology, v. 284-285, p. 181-196.
  • Heavens, N.G., Mahowald, N.M., Soreghan, G.S., Soreghan, M.J., and Shields, C.A., 2012, Glacial-interglacial variability in tropical Pangaean precipitation during the Late Paleozoic Ice Age: Simulations with a Community Climate System Model: Climate of the Past Discussions, v. 8, p. 1915-1972.
  • Sweet, D.E., and Soreghan, G.S., 2012, Estimating magnitudes of relative sea-level change in a coarse-grained fan delta system: Implications for Pennsylvanian glacioeustasy: Geology, v. 40, p. 979-982.
  • Stumpf, A.R., Elwood Madden, M.E., Soreghan, G.S., Hall, B.L., Keiser, L.J., and Marra, K.R., 2012, Glacier meltwater stream chemistry in Wright and Taylor Valleys, Antarctica: Significant roles of drift, dust, and biological processes in chemical weathering: Chemical Geology, v. 322-323, p. 79-90.
  • Soreghan, G.S., Keller, G.R., Gilbert, M.C., Chase, C.G., and Sweet, D.E., 2012, Load-induced subsidence of the Ancestral Rocky Mountains recorded by preservation of Permian landscapes: Geosphere, v. 8, p. 654-668.
  • Hartig, K., Soreghan, G.S., Goldstein, R., and Engel, M.E., 2011, Dolomite in Permian paleosols of the Bravo Dome CO2 Field: Permian reflux followed by late recrystallization at elevated temperatures: Journal of Sedimentary Research, v. 81, p. 248-265.
  • Sur, S., Soreghan, G.S., Soreghan, M.J., Yang, W., and Saller, A.H., 2010, A record of glacial aridity and Milankovitch-scale fluctuations in atmospheric dust from the Pennsylvanian tropics: Journal of Sedimentary Research, v. 80, p. 1046-1067.
  • Sur, S., Soreghan, M.J., Soreghan, G.S., and Stagner, A.F., 2010, Extracting the silicate mineral fraction from ancient carbonate: Assessing the geologic record of dust: Journal of Sedimentary Research, v. 80, p. 763-769.
  • Sweet, D.E., and Soreghan, G.S., 2010, Application of quartz sand microtextural analysis to infer cold-climate weathering in the equatorial Fountain Formation (Pennsylvanian-Permian, Colorado): Journal of Sedimentary Research, v. 80, p. 666-677.
  • Sweet, D.E., and Soreghan, G.S., 2010, Late Paleozoic tectonics and paleogeography of the ancestral Front Range: Structural, stratigraphic and sedimentologic evidence from the Fountain Formation (Manitou Springs, Colorado): Geological Society of America Bulletin, v. 122, p. 575-594.
  • Soreghan, G.S., Soreghan, M.J., Sweet, D.E., and Moore, K.D., 2009, Hot fan or cold outwash? Hypothesized proglacial deposition in the upper Paleozoic Cutler Formation, western tropical Pangea:  Journal of Sedimentary Research, v. 79, p. 495-522.
  • Soreghan, G.S., Soreghan, M.J., Poulsen, C.J., Young, R.A., Eble, C.F., Sweet, D.E., and Davogustto, O.C., 2008, Anomalous cold in the Pangaean tropics: Geology, v. 36, p. 659-662.
  • Soreghan, G.S., Soreghan, M.J., and Hamilton, M.A., 2008, Origin and paleoclimatic significance of tropical silt in the Late Paleozoic icehouse: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 268, p. 234-259.
  • Soreghan, M.J., Soreghan, G.S., and Hamilton, M.A., 2008, Glacial-interglacial shifts in atmospheric circulation of western tropical Pangaea: Palaeogeography, Palaeoclimatology, Palaeoecology, p. 260-272.
  • Sweet, D.E., and Soreghan, G.S., 2008, Polygonal cracking in coarse clastics records cold temperatures in the equatorial Fountain Formation (Pennsylvanian-Permian, Colorado): Palaeogeography, Palaeoclimatology, Palaeoecology, v. 268.
  • Moore, K.D., Soreghan, G.S., and Sweet, D.E., 2008, Stratigraphic and structural relations in the proximal Cutler Formation of the Paradox basin: Implications for timing of movement on the Uncompahgre front: Mountain Geologist, v. 45, p. 49-68.
  • Soreghan, G.S., Moses, A.M., Soreghan, M.J., Hamilton, M.A., Fanning, C.M., and Link, P.K., 2007, Palaeoclimatic inferences from upper Palaeozoic siltstone of the Earp Formation and equivalents, Arizona-New Mexico (USA). Sedimentology, v. 54, p. 701-719.
  • Soreghan, G.S., Sweet, D.E., Marra, K.R., Eble, C.F., Soreghan, M.J., Elmore, R.D., Kaplan, S.A., and Blum, M.D., 2007, An exhumed late Paleozoic canyon in the Rocky Mountains. Journal of Geology, v. 115, p. 473-481.
  • Soreghan, M.J. and Soreghan, G.S., 2007, Whole-rock geochemistry of upper Paleozoic loessite, western Pangaea:  Implications for paleo-atmospheric circulation. Earth and Planetary Science Letters, v. 255, p. 117-132.
  • Montanez, I.P. and Soreghan, G.S., 2006, Earth’s fickle climate: Lessons learned from deep-time ice ages: Geotimes, v. 51, p. 24-27.
  • Soreghan, G.S., 2005, Lessons from Earth’s deep time: The Chronicle of Higher Education, v.  Section B, p. B10 [July 15, 2005].
  • Soreghan, G.S., 2004, Déjá-vu all over again: Deep-time (climate) is here to stay: Palaios, v. 19, p. 1-2.
  • Tramp, K.L., Soreghan, G.S., and Elmore, R.D., 2004, Paleoclimatic inferences from paleopedology and magnetism of the Permian Maroon Formation loessite (Colorado, USA):  Geological Society of America Bulletin, v. 116, p.671-686.
  • Soreghan, G.S., and Soreghan, M.J., 2003, A reservoir characterization case study for sedimentary geology:  Journal of Geoscience Education, v. 51, p. 177-184.
  • Soreghan, G.S., Elmore, R.D., and Lewchuk, M.T., 2002, Sedimentologic-magnetic record of western Pangean climate in upper Paleozoic loessite (lower Cutler beds, Utah):  Geological Society of America Bulletin, v. 114, p. 1019-1035.
  • Soreghan, G.S., and Soreghan, M.J., 2002, Atmospheric dust and algal dominance in the late Paleozoic: A hypothesis:  Journal of Sedimentary Research, v. 72, p. 457-461.
  • Soreghan, M.J., Soreghan, G.S., and Hamilton, M.A., 2002, Paleowinds inferred from detrital-zircon geochronology of upper Paleozoic loessite, western equatorial Pangea:  Geology, v. 30, p. 695-698.
  • Doherty, P.D., Soreghan, G.S., and Castagna, J.P., 2002, Outcrop-based reservoir characterization:  A composie phylloid-algal mound, western Orogrande basin (New Mexico):  American Association of Petroleum Geologists Bulletin, v. 86, p. 779-795.
  • Seals, S.C., Soreghan, G.S., and Elmore, R.D., 2002, Fluctuations in Late Pennsylvanian (Virgilian) seawater chemistry inferred from submarine cements of phylloid algal mounds, western Orogrande basin (New Mexico):  New Mexico Geological Society Guidebook, 53rd Field Conference, Geology of White Sands, p. 167-177.
  • Kessler, J.L.P., Soreghan, G.S., and Wacker, H.J., 2001, Equatorial aridity in western Pangea: Lower Permian loessite and dolomitic paleosols in northeastern New Mexico:  Journal of Sedimentary Research, v. 71, p. 818-833.
  • Cogoini, M., Elmore, R.D., Soreghan, G.S., and Lewchuk, M., 2001, Contrasting rock-magnetic characteristics of two upper Paleozoic loessite/paleosol profiles: Physics and Chemistry of the Earth, v. 26, p. 905-910.
  • Soreghan, G.S., Engel, M.H., Furley, R. A., and Giles, K.A., 2000, Glacioeustatic transgressive reflux:  Stratiform dolomite in Pennsylvanian bioherms of the western Orogrande basin, New Mexico:  Journal of Sedimentary Research, v. 70, p. 1315-1332.
  • Soreghan, G.S., and Giles, K.A., 1999, Facies character and stratal responses to accommodation in Pennsylvanian bioherms, western Orogrande basin, New Mexico:  Journal of Sedimentary Research, v. 69, p. 893-908.
  • Soreghan, G.S., and Giles, K.A., 1999, Amplitudes of Late Pennsylvanian glacioeustasy:  Geology, v. 27, p. 255-258.
  • Soreghan, G.S., and Soreghan, M.J., 1999, A multi-week basin analysis lab for sedimentary geology:  Journal of Geoscience Education, v. 47, p. 59-66.
  • Soreghan, G. S., Elmore, R. D., Katz, B., Cogoini, M., and Banerjee, S., 1997, Pedogenically enhanced magnetic susceptibility variations preserved in Paleozoic loessite:  Geology, v. 25, p. 1003-1006.
  • Soreghan, G. S., 1997, Walther’s Law, climate change, and upper Paleozoic cyclostratigraphy in the Ancestral Rocky Mountains:  Journal of Sedimentary Research, v. 67, p. 1001-1004.
  • Soreghan, G.S., and Dickinson, W.R., 1994, Generic types of stratigraphic cycles controlled by eustasy:  Geology, v. 22, p. 759-761.
  • Soreghan, G.S., 1994, Stratigraphic responses to geologic processes:  Late Pennsylvanian eustasy and tectonics in the Pedregosa and Orogrande basins:  Geological Society of America Bulletin, v. 106, p. 1195-1211.
  • Soreghan, G.S., 1994, The impact of glacioclimatic change on Pennsylvanian cyclostratigraphy, in, Embry, A.F., Beauchamp, B., and Glass, D.J., eds., Pangea–Global environments and resources:  Canadian Society of Petroleum Geologists Memoir 17, p. 523-543.
  • Soreghan, G.S., 1992, Preservation and paleoclimatic significance of eolian dust in the Ancestral Rocky Mountains province:  Geology, v. 20, p. 1111-1114.