Jeffrey M.Trop

Associate Professor of Geology - Bucknell University

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Research Interests
Application of field, sedimentologic, geochronologic, paleontologic, petrologic, geochemical, and paleomagnetic data to the evolution of sedimentary basins and the tectonic development of the North American Cordillera – emphases in Mesozoic-Cenozoic forearc, intra-arc, strike-slip, and retroarc foreland basins in southern Alaska, including twelve field seasons in the Alaska Range, Wrangell-St. Elias Range, and Talkeetna Mountains; physical sedimentology and stratigraphy of sedimentary strata in Alaska, Arizona, and Pennsylvania; Mars-Earth analog studies of arctic depositional environments.

PUBLICATIONS ([ ] indicates graduation year of Bucknell University student co-author)

Refereed Abstracts

Idleman, B., Trop, J.M., and Ridgway, K.D., 2011, Geochronological evidence for rapid forearc subsidence and sedimentation during Paleogene spreading ridge subduction along the southern Alaska convergent margin: Geological Society of America, Abstracts with Programs, in press.

Donaghy, E. [‘12], Trop, J.M., and Idleman, B., 2011, Detrital geochronology and sedimentology of Paleogene sedimentary and volcanic rocks exposed on the southwestern flank of the Talkeetna Mountains, Alaska: implications for exhumation and basin development within a remnant forearc depocenter: Geological Society of America, Abstracts with Programs, in press.

Szwarc, T. [‘11], Trop, J.M., and Idleman, B., 2011, New stratigraphic and detrital geochronologic constraints on deformation, deposition, and dextral displacement along the Castle Mountain fault, south-central Alaska: Geological Society of America, Abstracts with Programs, in press.

Kochel, R.K., and Trop, J.M., 2011, Morphology and dynamics of icy debris fans: landform evolution along degrading escarpments undergoing rapid deglaciation in Alaska and New Zealand: Geological Society of America, Abstracts with Programs, in press.

Ridgway, K.D., Finzel, E.S., Trop, J.M., Enkelmann, E., Brennan, P.R.K., and Witmer, J. [‘07], 2011, Evaluating the role of Cenozoic flat-slab subduction processes on the regional tectonic, sedimentary basin, and climatic framework of southern Alaska : Eos Trans. AGU, Fall Meeting Supplement, in press.

Sunderlin, D., White, J.G., Lecomte, A.A., and Trop, J.M., 2011, Paleobotany and paleoecology of the Early Paleogene Arkose Ridge Formation, Talkeetna Mountains, Alaska: Geological Society of America, Abstracts with Programs, in press. 

 Kortyna, C.D. [‘11], Trop, J.M., Idleman, B., Kassab, C.M. [‘09], Ridgway. K.D., and Gehrels, G., 2010, Provenance signature of a forearc basin modified by spreading ridge subduction: detrital zircon geochronology and detrital modes from the Paleogene Arkose Ridge Formation, southern Alaska: Geological Society of America, Abstracts with Programs, v. 42, p. 54.

LeComte, A.A., Sunderlin, D., Kassab, C.M. [‘09], Kortyna, C.D. [‘11], and Trop, J.M., 2010, Floral remains in the Paleogene Arkose Ridge Formation, south-central Alaska: climatic and paleoenvironmental implications: Geological Society of America, Abstracts with Programs, v. 42, no. 1, p. 162.

Trop, J.M., Kortyna, C.D. [‘11], Valencia, V.A., Kassab, C.M. [‘09], Wooden, J.L., and Bradley, D.C., 2009, Detrital zircon provenance analysis of Cretaceous–Oligocene sedimentary strata from the Matanuska Valley-Talkeetna Mountains forearc basin, Southern Alaska; Geological Society of America, Abstracts with Programs, v. 41, no. 7, p. 304.

Bleick, H.A., Till, A.B., Bradley, D.C., O’Sullivan, P.B., Trop, J.M., Wooden, J.L., Bradley, D.B., Taylor, T.A., Friedman, S.B., and Hults, C.P., 2009, Early Tertiary exhumation of the flank of a forearc basin, southwest Talkeetna Mountains, Alaska: Geological Society of America, Abstracts with Programs, v. 41, no. 7, p. 303.

Kassab, C.M. [‘09], Kortyna, C.D. [‘11], Ridgway, K.D., and Trop, J.M., 2009, Sedimentology, structural framework, and basin analysis of the eastern Arkose Ridge Formation, Talkeetna Mountains, Alaska: Geological Society of America, Abstracts with Programs, v. 41, no. 7, p. 304.

Kortyna, C.D. [‘11], Trop, J.M., Lecomte, A.A., Bauer, E. [‘09], Kassab, C.M. [‘09], Sunderlin, D., and Ridgway, K.D., 2009, Sedimentology, paleontology, and structural framework of the central Arkose Ridge Formation, Talkeetna Mountains, Alaska: Geological Society of America, Abstracts with Programs, v. 41, no. 7, p. 304.

Finzel, E.S., Trop, J.M., and Ridgway, K.D., 2009, Modification of continental forearc basins by spreading ridge subduction and flat-slab subduction processes: a case study from southern Alaska: Geological Society of America, Abstracts with Programs, v. 41, no. 7, p. 517.

Trop, J.M., Snyder, D.C., Hart, W.K., Idleman, B., and Delaney, M.R.[‘06], 2007, Miocene intra-arc basin development within the Wrangell volcanic field, Frederika Formation and Lower Wrangell Lava, eastern Wrangell Mountains, Alaska: Geological Society of America, Abstracts with Programs, v. 39, no. 6, p. 491.

Kochel, R.C., and Trop, J.M., 2007, Earth analog for recent flows and high-latitude landforms on Mars: Icy debris fans in the Wrangell volcanic field, Alaska: Geological Society of America, Abstracts with Programs, v. 39, no. 6, p. 283.

Witmer, J.[‘07], Trop, J.M., Rioux, M., Palfy, J., and Blodgett, R.B., 2007, Stratigraphy, geochronology, geochemistry, and paleontology of the McCarthy Formation, Wrangell Mountains, Alaska: bearings on pre-collision crustal conditions within the Wrangellia terrane: Geological Society of America, Abstracts with Programs, v. 39, no. 6, p. 489.

Smith, S.G.[‘08], Kassab, C.M.[‘08], Trop, J.M., and Kochel, R.C., 2007, Overwash deposits on Hatteras and Ocracoke Islands, NC, Cape Hatteras National Seashore - a sedimentary record of tropical and extratropical storms along the Atlantic Coast and variation with shoreline orientation: Geological Society of America, Abstracts with Programs, v. 39, no. 6, p. 242.

Kochel, R.C., and Trop, J.M., 2007, Icy debris fans and flows in Alaska: Earth analog for recent Mars flows: 38th Annual Lunar and Planetary Science Conference, Proceedings of the Lunar and Planetary Science Conference, v. 38, no. 1338, p. 1813.

Ridgway, K.D., Trop, J.M., Hampton, B., Kalbas, J., Gehrels, G., Landis, P., 2007, Mesozoic and Cenozoic tectonic growth of southern Alaska: A sedimentary basin perspective: Ores and Orogenesis–A symposium honoring the career of William R. Dickinson: Program with Abstracts, p. 61.

Kelemen, P., Amato, J., Behn, M., Blusztajn, J., Christensen, N., Clift, P., DeBari, S., Draut, A., Greene, A., Hacker, B., Hanghoj, K., Hart, S., Hirth, G., Mattinson, J., Mehl, L., Pavlis, T., Rioux, M., and Trop, J., 2005, Crustal Genesis and Dynamics in the Jurassic Talkeetna Arc: Eos Trans. AGU, 86 (52), Fall Meet. Supplement, Abstract V44C-05.

Tidmore, R.S.[‘04], Delaney, M.R.[‘06], Trop, J.M., Snyder, D.S. , and Hart, W.K., 2005, New findings on the sedimentology, age, and geochemistry of the Miocene Frederika Formation, Alaska; implications for syntectonic sedimentation and volcanism within the Wrangell continental arc: Geological Society of America, Abstracts with Programs, v. 37, no. 7, p. 80.

Short, E.[‘06], Snyder, D.S., Trop, J.M., Hart, W.K., and Layer, P.W., 2005, Stratigraphic, isotopic, and geochronologic data from the Chisana Formation, southern Alaska: new insight on Early Cretaceous volcanism within the Wrangellia terrane: Geological Society of America, Abstracts with Programs, v. 37, no. 7, p. 81.

Trop, J.M., 2005, Mesozoic-Cenozoic changes in the tectonic setting of the Wrangell Mountains basin, southern Alaska: influence of terrane accretion and arc migration: Geological Society of America, Abstracts with Programs, v. 37, no. 7, p. 80.

Trop, J.M., Hampton , B.A., Ridgway, K.D., and Gehrels, G.E., 2005, New stratigraphic and geochronologic data from latest Cretaceous basinal strata in south-central Alaska: forearc to retroarc synorogenic sedimentation across an accretionary convergent margin: Geological Society of America, Abstracts with Programs, v. 37, no. 7, p. 81.

Trop, J.M., Ridgway, K.D., Hampton, B.A., and Kalbas, J., 2005, Mesozoic-Cenozoic sedimentary record of arc accretion and continental growth in southern Alaska: Geological Society of America, Abstracts with Program s, v. 37, no. 7, p. 80

Trop, J.M., and Ravn, R.L., 2003, Sedimentology, palynology, and petrology of the Cretaceous Matanuska Formation, south-central Alaska: relationships between forearc basin development and accretionary tectonic events: Geological Society of America, Abstracts with Programs, in press.

Trop, J.M., Ridgway, K.D., Szuch, D. A. [‘02], and Slaughter, T.C.[‘02], 2003, Mesozoic basin development and deformation along the outboard margin of the Wrangellia composite terrane, southern Alaska: Geological Association of Canada

Trop, J.M., Ridgway, K.D., Szuch, D. A. [‘02], and Slaughter, T.C.[‘02], 2003, Mesozoic basin development and deformation along the outboard margin of the Wrangellia composite terrane: Geological Society of America, Abstracts with Programs, v. 34, in press.

Ridgway, K.D., Eastham, K.R., Trop, J.M., and Davidson, C.M., 2003, Mesozoic basin development and deformation along the inboard margin of the Wrangellia composite terrane: Geological Society of America, Abstracts with Programs, v. 34, in press.

Slaughter, T.C.[‘02], Trop, J.M., Evenson, E.B., and Lawson, D.E., 2002, Glacially transported boulders are moving oblique to ice flow on a high-latitude glacier: Matanuska Glacier, Alaska, USA: Geological Society of America, Abstracts with Programs, v. 34, in press.

Szuch, D.A. [‘02], and Trop, J.M., 2001, Synorogenic sedimentation along the arcward margin of a Mesozoic forearc basin, Naknek Formation, Talkeetna Mountains, Alaska: Geological Society of America, Abstracts with Programs, v. 33, no. 6, p. 390.

Trop, J.M., Ridgway, K.D., and Sweet, A.R., 2001, Oligocene transpressional strike-slip basin development and sedimentation along the Denali Fault System, Colorado Creek basin, Alaska Range: Geological Society of America, Abstracts with Programs, v. 33, no. 6, p. 391.

Trop, J.M., Ridgway, K.D., and Spell, T.L., 2000, Tectonic controls on nonmarine deposystems in a Tertiary forearc basin, Matanuska Valley-Talkeetna Mountains, southern Alaska: Geological Society of America, Abstracts with Programs, v. 32.

Trop, J.M., Stamatakos, J.A., and Ridgway, K.D., 1999, Northward translation history of the allochthonous Wrangellia terrane: new paleomagnetic and paleobiogeographic data from the Jurassic-Cretaceous Wrangell Mountains basin, Alaska: EOS, American Geophysical Union Transactions,v. 80.

Trop, J.M., and Ridgway, K.D., 1999, Sedimentary basin development on the allochthonous Wrangellia composite terrane, Mesozoic Wrangell Mountains basin, Alaska: A long-term record of terrane migration and arc construction: Geological Society of America, Abstracts with Programs, v. 31.

Trop, J.M., Krockover, G., and Ridgway, K.D., 1999, Integration of field observations with laboratory modeling for understanding hydrologic processes in an undergraduate earth science course: Geological Society of America, Abstracts with Programs, v. 31.

Manuszak, J.D., Trop, J.M., and Ridgway, K.D., 1999, Sedimentary basin development along an accretionary convergent margin: Jurassic-Cretaceous Wrangell Mountains and Nutzotin basins, southern Alaska: Geological Society of America, Abstracts with Programs, v. 31.

Trop, J.M., and Ridgway, K.D., 1998, Sedimentary record of Jurassic-Cretaceous deformation of the Wrangellia terrane, Wrangell Mountains basin, Alaska: Geological Society of America, Abstracts with Programs, v. 30, p. 68.

Ridgway, K.D., Trop, J. M., Nokleberg, W., and Davidson, C.M., 1998, Mesozoic and Cenozoic tectonics of the eastern and central Alaska Range: Progressive basin development and deformation within a suture zone: Geological Society of America, Abstracts with Programs, v. 31, p. 242.

Ridgway, K.D., and Trop, J.M., 1998, Mesozoic and Cenozoic sedimentary basin development along the Alaska Range suture zone, south-central Alaska: Geological Society of America, Abstracts with Programs, v. 30, p. 61.

Trop, J.M., Ridgway, K.D., and Sweet, A. R., 1997, Tectonic controls on submarine fan deposystems along the southern Alaska forearc basin, Late Cretaceous MacColl Ridge Formation, Wrangell Mountains, Alaska: Geological Society of America Abstracts with Programs, v. 29, p. 217.

Ridgway, K.D., and Trop, J.M., 1997, Formation and evolution of sedimentary basins along an accretionary/collisional plate boundary, Alaska: International Conference and Sino-American Symposium on Tectonics of East Asia Abstract: Programe and Abstracts, p. 21.

Trop, J.M., and Ridgway, K.D., 1996, Thrust-top basin formation and sediment dispersal along a suture zone, Cantwell basin, central Alaska Range: Geological Society of America, Abstracts with Programs, v. 28, p. 312.

Trop, J.M., and Ridgway, K.D., 1995, Provenance of the Cantwell Formation, Cantwell basin, Alaska Range: Geological Society of America, Abstracts with Programs, v. 27, p. 82.

Ridgway, K.D., Trop, J.M., and Sweet, A.R., 1995, Sedimentary and tectonic history of the Cantwell basin, Alaska Range: Geological Society of America, Abstracts with Programs, v. 27, p. 73.

Non-Refereed Abstracts

Trop, J.M., 2003, Mesozoic-Cenozoic basin development and deformation along the outboard margin of the Wrangellia composite terrane: Alaska Geological Society, Monthly Newsletter, v. 33, no. 9, p. 1-2.

Refereed Journal Articles (published or accepted)

Trop, J.M., Snyder, D., Hart, W.K., and Idleman, B.D., Miocene basin development and volcanism along a strike-slip to flat-slab subduction transition: stratigraphy, geochemistry, and geochronology of the central Wrangell volcanic belt, Yakutat-North America collision zone: Geosphere, v. 8; no. 4; p. 805–834; doi:10.1130/GES00762.1.

Kochel, R.C., and Trop, J.M., 2012, Morphology and dynamics of icy debris fans: landform evolution along degrading escarpments undergoing rapid deglaciation in Alaska and New Zealand: Geomorphology, v. 151-152, p. 59-76.

Ridgway, K.D., Trop, J.M., and Finzel, E.S., 2012, Modification of continental forearc basins by spreading ridge subduction and flat-slab subduction processes: a case study from southern Alaska: submitted to Recent Advances in Tectonics of Sedimentary Basins, book volume edited by C. Busby and A. Azor, in press.

Finzel, E.S., Trop, J.M., and Ridgway, K.D., 2011, Upper-plate proxies for flat-slab subduction processes in southern Alaska: Earth and Planetary Sciences Letters.

Bradley, D., Haeussler, P., O’Sullivan, P., Friedman, R., Till, A., Bradley, D., and Trop, J., 2009, Detrital zircon geochronology of Cretaceous and Paleogene strata across the south-central Alaskan convergent margin, in Haeussler, P.J., and Galloway, J.P., Studies by the U.S. Geological Survey in Alaska, 2007: U.S. Geological Survey Professional Paper 1760-F, 36 p.

Trop, J.M., 2008, Latest Cretaceous forearc basin development along an accretionary convergent margin: south-central Alaska: Geological Society of America Bulletin, v. 120, p. 207-224.

Kochel, R.C., and Trop, J.M., 2008, Earth analog for high-latitude landforms and recent flows on Mars: Icy debris fans in the Wrangell volcanic field, Alaska: Icarus, DOI: 10.1016/j.icarus.2008.03.006.

Trop, J.M., and Ridgway, K.D., 2007, Mesozoic and Cenozoic tectonic growth of southern Alaska: a sedimentary basin perspective:in Ridgway, K.D., Trop, J.M., and Glen, J.M.G., eds., Tectonic Growth of a Collisional Continental Margin: Crustal Evolution of Southern Alaska: Geological Society of America Special Paper 431, p. 55-94.

Manuszak, J.D., Ridgway, K.D., Trop, J.M., and Gehrels, G.E., 2007, Sedimentary Record of the tectonic growth of a collisional continental margin: Upper Jurassic-Lower Cretaceous Nutzotin Mountains Sequence, eastern Alaska Range, Alaska: in Ridgway, K.D., Trop, J.M., and Glen, J.M.G., eds., Tectonic growth of a collisional continental margin: Crustal evolution of southern Alaska, Geological Society of America Special Paper 431, p. 345-377.

Trop, J.M., Szuch, D.A. [‘02], Rioux, M., Blodgett, R.B., 2005, Sedimentology and provenance of the Upper Jurassic Naknek Formation, Talkeetna Mountains, Alaska: bearings on the accretionary tectonic history of the Wrangellia composite terrane: Geological Society of America Bulletin, v. 117, no. 5/6, p. 570–588.

Trop, J.M., Ridgway, K.D., and Sweet, A.R., 2004, Stratigraphy, palynology, and provenance of the Colorado Creek basin, Alaska, U.S.A.: Oligocene transpressional tectonics along the Central Denali fault system: Canadian Journal of Earth Sciences, Canadian Journal of Earth Sciences, v. 41., no. 4, p. 457-480.

Trop, J.M., Ridgway, K.D. and T.L. Spell, 2003, Synorogenic sedimentation and forearc basin development along a transpressional plate boundary, Matanuska Valley-Talkeetna Mountains, southern Alaska: in Sisson, V. B., Roeske, S., and Pavlis, T. L., eds: Geology of a transpressional orogen developed during ridge-trench interaction along the north Pacific margin: Geological Society of America Special Paper 371, p. 89-118.

Ridgway, K.D., Trop, J.M., Nokleberg, W., Davidson, C.M., and Eastham, K.D., 2002, Mesozoic and Cenozoic tectonics of the eastern and central Alaska Range: Progressive basin development and deformation within a suture zone: Geological Society of America Bulletin, v. 114, p. 1480-1504.

Stamatakos, J., Trop, J.M., and Ridgway, K.D., 2001, Late Cretaceous paleogeography of Wrangellia: paleomagnetism of the MacColl Ridge Formation, southern Alaska, revisited: Geology, v. 29, no. 10, p. 947–950.

Trop, J.M., and Ridgway, K.D., 2000, Sedimentology, stratigraphy, and tectonic importance of the Paleocene-Eocene Arkose Ridge Formation, Cook Inlet-Matanuska Valley forearc basin, Alaska, in Pinney, D.S. and Davis, P.K., eds., Short notes on Alaskan Geology 1999, Fairbanks, Alaska, Division of Geological and Geophysical Surveys Professional Report 119, p. 129-144

Ridgway, K.D., Trop, J.M., and Sweet, A.R., 2000, Stratigraphy, depositional systems, and age of the White Mountain basin, Denali fault system, southwestern Alaska: in Pinney, D.S. and Davis, P.K., eds., Short notes on Alaskan Geology 1999, Fairbanks, Alaska, Division of Geological and Geophysical Surveys Professional Report 119, p. 77-84.

Trop, J.M., Krockover, G., and Ridgway, K.D., 2000, Integration of field observations with laboratory modeling for understanding hydrologic processes in an undergraduate earth science course: Journal of Geoscience Education, v. 48, p. 3-10.

Trop, J.M., Ridgway, K.D., Sweet, A.R., and Layer, P.W., 1999, Submarine fan deposystems and tectonics of a Late Cretaceous forearc basin along an accretionary convergent plate boundary, MacColl Ridge Formation, Wrangell Mountains, Alaska: Canadian Journal of Earth Sciences, v. 36, p. 433-458.

Ridgway, K.D., Trop, J.M., and Jones, D.E., 1999, Neogene uplift of the central Alaska Range: Tectonic and paleoclimatic controls on the detrital record: Journal of Sedimentary Research, v. 69, p. 1262-1275.

Trop, J.M., and Ridgway, K.D., 1997, Petrofacies and provenance of a Late Cretaceous thrust-top basin, Cantwell basin, central Alaska Range: Journal of Sedimentary Research, v. 67, p. 469-485.

Ridgway, K.D., Trop, J.M., and Sweet, A.R., 1997, Thrust-top basin formation along a suture zone, Cantwell basin, Alaska Range: Implications for development of the Denali fault system: Geological Society of American Bulletin, v. 109, p. 505-523.

Non-Refereed Guidebook Articles

Trop, J.M., and Plawman, T., 2006, Bedrock geology of the Glenn Highway from Anchorage to Sheep Mountain, Alaska – Mesozoic-Cenozoic forearc basin development along an accretionary convergent margin: Geological Society of America Field Trip Guidebook – Cordillera Section, 45 p.

NOTE - Guidebook can be purchased from the Alaska Geological Society

Trop, J.M., 2005, Sedimentology and provenance of Cretaceous-Tertiary strata in the Matanuska Valley, south-central Alaska, in: Guide to the Bedrock and Glacial Geology of the Glenn Highway from Anchorage to Matanuska Glacier and Matanuska Coal Mining District, Alaska Geological Society, Field Guide, 2nd Edition.

Trop, J.M., Ridgway, K.D., and Sweet, A.R., 1995, Geologic history of the lower Cantwell Formation, Cantwell basin, south-central Alaska, in: Brease, P., and Till, A., eds., The Geology and Glacial History of Denali National Park and Vicinity: Geological Society of America Field Trip #9 Guidebook and Roadlog-Cordilleran Section, p. 28-55.

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