Florence Bascom Geoscience Center

Publications

Filter Total Items: 348
Publication Thumbnail
Year Published: 2017

Geologic map of the Dusar area, Herat Province, Afghanistan; Modified from the 1973 original map compilations of V.I. Tarasenko and others

The geologic maps and cross sections presented in this report are redrafted and modified versions of the Geologic map and map of useful minerals of the Dusar area (scale 1:50,000) and Geologic sketch map of the Dusar and Namak-sory ore occurrences (scale 1:10,000), located in the Herat Province, Afghanistan. The original maps and cross sections...

Tucker, Robert D.; Stettner, Will R.; Masonic, Linda M.; Bogdanow, Anya K.
Tucker, R.D., Stettner, W.R., Masonic, L.M., and Bogdanow, A.K., comps., 2017, Geologic map of the Dusar area, Herat Province, Afghanistan; Modified from the 1973 original map compilations of V.I. Tarasenko and others: U.S. Geological Survey Open-File Report 2017–1126, 1 sheet, scales 1:50,000 and 1:10,000, https://doi.org/10.3133/ofr20171126.

Publication Thumbnail
Year Published: 2017

Application of paleoecology to ecosystem restoration: A case study from south Florida’s estuaries

Paleoecological analyses of biotic assemblages from cores collected throughout south Florida’s estuaries indicate gradually increasing salinities over approximately the last 2000 years, consistent with rising sea level. Around the beginning of the twentieth century these gradual patterns of change began to shift, corresponding to the beginning of...

Weckström, Kaarina; Saunders, Krystyna M.; Gell, Peter A.; Skilbeck, C. Gregory; Wingard, G. Lynn

Publication Thumbnail
Year Published: 2017

A transect through Vermont’s most famous volcano – Mount Ascutney: GSNH Summer 2017 Field Trip

No abstract available.

Walsh, Gregory J.
Walsh, G.J., 2017, A transect through Vermont’s most famous volcano – Mount Ascutney: Geological Survey of New Hampshire, Granite State Geologist, September 2017, no. 98, 4 p.,http://www.gsnh.org/uploads/9/2/8/6/92861090/gsnh_mnt_ascutney_summer_2017_field_trip_guidebook.pdf

Publication Thumbnail
Year Published: 2017

Hypogene caves of the central Appalachian Shenandoah Valley in Virginia

Several caves in the Shenandoah Valley in Virginia show evidence for early hypogenic conduit development with later-enhanced solution under partly confined phreatic conditions guided by geologic structures. Many (but not all) of these caves have been subsequently invaded by surface waters as a result of erosion and exhumation. Those not so...

Doctor, Daniel H.; Orndorff, Wil
Doctor, D.H. and Orndorff, W. (2017) Hypogene Caves of the Central Appalachian Shenandoah Valley in Virginia, in: Klimchouk, A., Palmer, A., De Waele, J., Auler, A., and Audra, P., eds., Hypogene Karst Regions and Caves of the World: New York, Springer, ISBN: 978-319-53347-6, doi: 10.1007/978-3-319-53348-3

Publication Thumbnail
Year Published: 2017

New insight into the origin of manganese oxide ore deposits in the Appalachian Valley and Ridge of northeastern Tennessee and northern Virginia, USA

Manganese oxide deposits have long been observed in association with carbonates within the Appalachian Mountains, but their origin has remained enigmatic for well over a century. Ore deposits of Mn oxides from several productive sites located in eastern Tennessee and northern Virginia display morphologies that include botryoidal and branching...

Carmichael, Sarah K.; Doctor, Daniel H.; Wilson, Crystal G.; Feierstein, Joshua; McAleer, Ryan J.
Sarah K. Carmichael, Daniel H. Doctor, Crystal G. Wilson, Joshua Feierstein, and Ryan J. McAleer New insight into the origin of manganese oxide ore deposits in the Appalachian Valley and Ridge of northeastern Tennessee and northern Virginia, USA Geological Society of America Bulletin, B31682.1, first published on May 11, 2017,

Publication Thumbnail
Year Published: 2017

Linkages and feedbacks in orogenic systems: An introduction

Orogenic processes operate at scales ranging from the lithosphere to grain-scale, and are inexorably linked. For example, in many orogens, fault and shear zone architecture controls distribution of heat advection along faults and also acts as the primary mechanism for redistribution of heat-producing material. This sets up the thermal structure of...

Thigpen, J. Ryan; Law, Richard D.; Merschat, Arthur J.; Stowell, Harold
Thigpen, J.R., Law, R.D., Merschat, A.J., and Stowell, H.H., 2017, Linkages and feedbacks in orogenic systems: An introduction, in Law, R.D., Thigpen, J.R., Merschat, A.J., and Stowell, H.H., eds., Linkages and Feedbacks in Orogenic Systems: Geological Society of America Memoir 213, p. vii–xv, doi:10.1130/2017.1213(00).

Publication Thumbnail
Year Published: 2017

Temporal and spatial distribution of Paleozoic metamorphism in the southern Appalachian Blue Ridge and Inner Piedmont delimited by ion microprobe U-Pb ages of metamorphic zircon

Ion microprobe U-Pb zircon rim ages from 39 samples from across the accreted terranes of the central Blue Ridge, eastward across the Inner Piedmont, delimit the timing and spatial extent of superposed metamorphism in the southern Appalachian orogen. Metamorphic zircon rims are 10–40 µm wide, mostly unzoned, and dark gray to black or bright white...

Merschat, Arthur J.; Bream, Brendan R.; Huebner, Matthew T.; Hatcher, Robert D.; Miller, Calvin F.
Merschat, A.J., Bream, B.R., Huebner, M.T., Hatcher, R.D., Jr., and Miller, C.F., 2017, Temporal and spatial distribution of Paleozoic metamorphism in the southern Appalachian Blue Ridge and Inner Piedmont delimited by ion microprobe U-Pb ages of metamorphic zircon, in Law, R.D., Thigpen, J.R., Merschat, A.J., and Stowell, H.H., eds., Linkages and Feedbacks in Orogenic Systems: Geological Society of America Memoir 213, p. 199–254, doi:10.1130/2017.1213(10).

Publication Thumbnail
Year Published: 2017

Reconstructing Common Era relative sea-level change on the Gulf Coast of Florida

To address a paucity of Common Era data in the Gulf of Mexico, we reconstructed ~ 1.1 m of relative sea-level (RSL) rise over the past ~ 2000 years at Little Manatee River (Gulf Coast of Florida, USA). We applied a regional-scale foraminiferal transfer function to fossil assemblages preserved in a core of salt-marsh peat and...

Gerlach, Matthew J.; Engelhart, Simon E.; Kemp, Andrew C.; Moyer, Ryan P.; Smoak, Joseph M.; Bernhardt, Christopher E.; Cahill, Niamh
Marine Geology, 390 (2017) 254-269

Publication Thumbnail
Year Published: 2017

Characterizing meteorological and hydrologic conditions associated with shallow landslide initiation in the coastal bluffs of the Atlantic Highlands, New Jersey

Meteorological and hydrologic conditions associated with shallow landslide initiation in the coastal bluffs of the Atlantic Highlands, New Jersey remain undocumented despite a history of damaging slope movement extending back to at least 1903. This study applies an empirical approach to quantify the rainfall conditions leading to shallow...

De Graff, Jerome V.; Shakoor, Abdul; Ashland, Francis; Fiore, Alex R.; Reilly, Pamela A.
Ashland, F.X., Fiore, A.R., and Reilly, P.A., 2017, Characterizing meteorological and hydrologic conditions associated with shallow landslide initiation in the coastal bluffs of the Atlantic Highlands, New Jersey, in De Graff, J.V., and Shakur, A., eds. Landslides: Putting Experience, Knowledge and Emerging Technologies into Practice: Proceedings of the 3rd North American Symposium on Landslides, Roanoke, V.A., June 4–8, 2017, Association of Environmental & Engineering Geologists Special Publication 27, p. 461-472, ISBN: 978-0-9897253-7-8

Publication Thumbnail
Year Published: 2017

Post-glacial flooding of the Bering Land Bridge dated to 11 cal ka BP based on new geophysical and sediment records

The Bering Strait connects the Arctic and Pacific oceans and separates the North American and Asian landmasses. The presently shallow ( ∼  53 m) strait was exposed during the sea level lowstand of the last glacial period, which permitted human migration across a land bridge today referred to as the Bering Land Bridge. Proxy studies (stable isotope...

Jakobsson, Martin; Pearce, Christof; Cronin, Thomas M.; Backman, Jan; Anderson, Leif G.; Barrientos, Natalia; Bjork, Goran; Coxhall, Helen; de Boer, Agatha; Mayer, Larry; Morth, Carl-Magnus; Nilsson, Johan; Rattray, Jayne; Sranne, Christian; Semiletov, Igor; O'Regan, Matt
Jakobsson, M., Pearce, C., Cronin, T. M., Backman, J., Anderson, L. G., Barrientos, N., … O'Regan, M. (2017). Post-glacial flooding of the Beringia Land Bridge dated to 11,000 cal yrs BP based on new geophysical and sediment records. Climate of the Past Discussions, 1–22

Publication Thumbnail
Year Published: 2017

Shallow marine response to global climate change during the Paleocene-Eocene Thermal Maximum, Salisbury Embayment, USA

The Paleocene-Eocene Thermal Maximum (PETM) was an interval of extreme warmth that caused disruption of marine and terrestrial ecosystems on a global scale. Here we examine the sediments, flora, and fauna from an expanded section at Mattawoman Creek-Billingsley Road (MCBR) in Maryland and explore the impact of warming at a nearshore shallow marine...

Self-Trail, Jean M.; Robinson, Marci M.; Bralower, Timothy J.; Sessa, Jocelyn A.; Hajek, Elizabeth A.; Kump, Lee R.; Trampush, Sheila M.; Willard, Debra A.; Edwards, Lucy E.; Powars, David S.; Wandless, Gregory A.
Self-Trail, J.M., et al., (2017), Shallow marine response to global climate change during the Paleocene-Eocene Thermal Maximum, Salisbury Embayment, USA, Paleoceanography, 32, doi:10.1002/2017PA003096

Publication Thumbnail
Year Published: 2017

Mapping informal small-scale mining features in a data-sparse tropical environment with a small UAS

This study evaluates the use of a small unmanned aerial system (UAS) to collect imagery over artisanal mining sites in West Africa. The purpose of this study is to consider how very high-resolution imagery and digital surface models (DSMs) derived from structure-from-motion (SfM) photogrammetric techniques from a small UAS can fill the gap in...

Chirico, Peter G.; Dewitt, Jessica D.
Chirico, P.G. and DeWitt, J.D., 2017, Mapping informal small-scale mining features in a data-sparse tropical environment with a small UAS. Journal of Unmanned Vehicle Systems. Vol. 5 Iss. 3). pg. 69-91.