Loma Linda University

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Paul Buchheim, PhD
Program Coordinator, Earth and Biological Sciences
School of Medicine
Professor, Earth and Biological Sciences
School of Medicine
Member, Faculty of Graduate Studies
Research & Grantsmanship    Funded Research Project (PI)
  • Geologic Mapping of southwestern Wyoming (Fossil Basin) ( 7/2005 - 7/2006 )
  • Stratigraphic corellation of the Fossil Butte and Tipton Members of the Green River Formation, Wyoming ( 7/2005 - 7/2006 )
  • Stratigraphic corellation of tuff and other marker beds between Washakie and Green River Basins ( 7/2005 - 7/2006 )
  • Stromatolites as archives of paleoclimate and lake hydrodynamics ( 7/2005 - 7/2006 )
  • Stratigraphic Revision of the Green River Formation in Fossil Basin ( 7/2004 - 6/2005 )
  • Geologic Mapping of 12- 7.5 Minute Quadrangles in Fossil Basin, Wyoming ( 7/2004 - 6/2005 )
  Funded Research Project (CI)
  • Limnogeology of the Meentheena Member, Fortescue Fm., Northwestern Australia ( 7/2005 - 7/2006 )
  • Geochemical and sedimentological influence of cotemporaneous lake springs on adjacent lacustrine sediments ( 7/2005 - 7/2006 )
  • Stromatolites of the LaClede Bed: an Archive of Paleoenvironments and Climate ( 7/2005 - 7/2006 )
  • Trackways of the Copper Canyon "formation" ( 7/2005 - 7/2006 )
  • Deposition of the White Marker Bed: Climate Change, Salinity Gradients or Marginal Freshwater Lagoon? ( 7/2004 - 6/2005 )
  • Paleoenvironmental reconstruction of a Miocene mammal and bird track site within basin fill sediments of the Copper and Coffin canyons, Death Valley National Park, California. ( 7/2004 - 6/2005 )
  • The Meentheena Carbonate (Tumbiana Formation; Fortescue Group, Western Australia): A Giant, Late Archean Lakes System ( 7/2004 - 6/2005 )
  • Stromatolite Paleoenvironments in the Laney Member of the Green River Formation ( 7/2004 - 6/2005 )
  • Gaint Spring Deposits of the Wilken's Peak Member of the Green River Formation ( 7/2004 - 6/2005 )
  Non-Funded Research Project
  • PALEOENVIRONMENTAL FACTORS CONTROLLING MICROBIALITE BIOHERM DEPOSITION AND DISTRIBUTION IN THE GREEN RIVER FORMATION ; BUCHHEIM, H. Paul1, AWRAMIK, Stanley M.2, and LEGGITT, V. Leroy1, (1) Department of Earth and Biological Sciences, Loma Linda University, Loma Linda, CA 92350, pbuchheim@llu.edu, (2) Department of Earth Science, University of California, Santa Barbara, Preston Cloud Research Laboratory, Santa Barbara, CA 93106 ( 7/2008 - 6/2009 )
    The Eocene Green River Formation of Wyoming, Utah, and Colorado contains the most diverse and abundant occurrences of lacustrine microbialites known. One of the largest oil fields in the Uinta Basin, Utah, is sourced from a 30 m thick, 4 km long microbialite/oolite bioherm that has produced close to a million barrels of oil. Outcrop exposures of analogous bioherms occur in the Piceance Creek Basin (Colorado), Fossil Basin (Wyoming), and Green River Basin (Wyoming). These occurrences provide analogs for exploration of petroleum in other lake basins. Recently described microbialite bioherms up to 9 m thick from the La Barge area of the Green River Basin of Wyoming may provide the best outcrop analogs. The bioherms are composed of domical and columnar stromatolites, some 2 to 3 meters in diameter, as well as ooids, oncoids, calcified caddisfly larval cases, and other carbonate components. Laterally, bioherms are discontinuous (each up to 150 m in diameter); however, the lake-margin bioherm system is found in a large arc (over 250 km) across the western, northern, and eastern greater Green River Basin. Bioherms grade laterally into adjacent calcitic lake facies over a distance of 100 meters and into dolomitic oil shales of the Wilkins Peak Member over 15 km. Since thick microbialites are reservoir rocks in some oil fields, it is important to understand the paleoenvironmental conditions that favor the formation of bioherms over biostromes. In the southeastern part of the Green River Basin, biostromes are the exclusive megastructure of microbialites, whereas in the northwest to northeast part of the basin bioherms occur in addition to biostromes. The biostromes are found in facies sequences interpreted to be balanced-filled lake deposits where regressions and transgressions over very low gradients were frequent. Bioherms appear to have been favored by under-filled lake basin conditions, where localized fresh-water deposition was restricted to the lake margins. The Green River Formation bioherms provides valuable insights into the exploration of microbialites as petroleum reservoirs in ancient lake basins. Further study of the bioherms of the Green River Formation should provide data that will help to better understand their origin, stratigraphic, and spatial location in ancient lake basins.
  Abstracts Reporting Research -- Peer Reviewed
  •   SPENCER,  Rodney S.,  LEGGITT, V. Leroy, and BUCHHEIM, H. Paul, PALEOENVIRONMENTS OF MIOCENE LAKE BARSTOW: BLACK CANYON, CALIFORNIA, Cordilleran Section (104th Annual) and Rocky Mountain Section (60th Annual) Joint Meeting (19–21 March 2008) ( 3/2008 )
  • Leggitt, V.L., Buchheim, H.P., Cushman, R.A., Jr.. "Crocodilian eggshell fragments encased in stromatolites from the Laney Member of the Green River Formation." Journal of Vertebrate Paleontology . (2005): 149--. ( 10/2005 )
  • Leggitt, V.L., Buchheim, H.P., Cushman, R.A., Jr... "Turtle shells as nuclei for caddisfly-dominated microbial carbonate mounds: Wilkins Peak Member, Eocene Green River Formation." Journal of Vertebrate Paleontology 25. (2005): 83A--. ( 10/2005 )
  • Nyborg, T. and H.P. Buchheim. "Depositional environment, tectonics, and animal track distribution of the Neogene fluvial-lacustrine Copper Canyon Unit, Death Valley National Park." Geological Society of America Abstracts with Programs 37.7 (2005): 440-. ( 10/2005 )
  • Mayry, Matthew, and Buchheim, H. Paul. " GEOCHEMICAL AND SEDIMENTOLOGICAL RECORDS OF LACUSTRINE-SPRING INTERACTIONS: A LARGE SPRING MOUND OF THE EOCENE GREEN RIVER FORMATION." Geological Society of America Abstracts with Programs 37.7 (2005): 372-. ( 10/2005 ) Link...
  • Matthew S. Mayry and H. Paul Buchheim. "Spring mounds within the Tipton and Wilkins Peak Members of the Eocene Green River Formation; geochemical and sedimentological influences on Lake Gosiute." Abstracts with Programs - Geological Society of America 36.5 (2004): 285-285. ( 11/2004 ) Link...
  • Carol Shultz, H. Paul Buchheim, and Stanley Awramik. "A high resolution archive of lake dynamics preserved in the stromatolites of the Laney Member of the Green River Formation (Eocene)." Abstracts with Programs - Geological Society of America 36.5 (2004): 285-285. ( 11/2004 ) Link...
  • Torrey Nyborg and H. Paul Buchheim . "Trace fossils of the Copper Canyon Formation, Death Valley National Park, California, USA; the most abundant and diverse assemblage of fossil mammal and bird tracks in North America and possibly the world." Abstracts with Programs - Geological Society of America 36.5 (2004): 54-54. ( 11/2004 ) Link...
  • H. Paul Buchheim, Roberto E. Biaggi, and Robert A. Cushman. "Evolution of Fossil Lake, Wyoming during deposition of the Eocene Green River Formation." Abstracts with Programs - Geological Society of America 36.5 (2004): 35-35. ( 11/2004 ) Link...
  • Leggitt, V. Leroy , Roberto Biaggi, and H. Paul Buchheim. "Avian eggshell fragments confirm lake margin fluctuation; Tipton Shale Member, Eocene Lake Gosiute." Journal of Vertebrate Paleontology 24.3 (2004): 82-82. ( 9/2004 )