Florence Bascom Geoscience Center

Publications

Filter Total Items: 385
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Year Published: 2014

A methodological toolkit for field assessments of artisanally mined alluvial diamond deposits

This toolkit provides a standardized checklist of critical issues relevant to artisanal mining-related field research. An integrated sociophysical geographic approach to collecting data at artisanal mine sites is outlined. The implementation and results of a multistakeholder approach to data collection, carried out in the assessment of Guinea’s...

Chirico, Peter G.; Malpeli, Katherine C.
A methodological toolkit for field assessments of artisanally mined alluvial diamond deposits; 2014; TM; 11-D2; Section D: Field survey methods in Book 11 Collection and Delineation of Spatial Data; Chirico, Peter G.; Malpeli, Katherine C.

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Year Published: 2014

Surficial geologic map of the Charleston region, Berkeley, Charleston, Colleton, Dorchester, and Georgetown Counties, South Carolina

This map portrays the surface and shallow subsurface geology of the greater Charleston, S.C. region east of 80°30′ west and south of 33°15′ north. The region covers the entirety of Charleston County and portions of Berkeley, Colleton, Dorchester, and Georgetown Counties. Units locally exposed at the surface range in age from middle Eocene to...

Weems, Robert E.; Lewis, William C.; Lemon, Earl M.
Surficial geologic map of the Charleston region, Berkeley, Charleston, Colleton, Dorchester, and Georgetown Counties, South Carolina; 2014; OFR; 2013-1030; Weems, Robert E; Lewis, William C.; Lemon, Earl M., Jr.

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Year Published: 2014

A shift of thermokarst lakes from carbon sources to sinks during the Holocene epoch

Thermokarst lakes formed across vast regions of Siberia and Alaska during the last deglaciation and are thought to be a net source of atmospheric methane and carbon dioxide during the Holocene epoch1,2,3,4. However, the same thermokarst lakes can also sequester carbon5, and it remains uncertain whether carbon uptake by thermokarst lakes can offset...

Walter Anthony, K. M.; Zimov, S. A.; Grosse, G.; Jones, Miriam C.; Anthony, P.; Chapin, F. S.; Finlay, J. C.; Mack, M. C.; Davydov, S.; Frenzel, P.F.; Frolking, S.
Anthony, K.M.W., Zimov, S.A., Grosse, G., Jones, M.C., Anthony, P.M., Chapin, F.S., Finlay, J.C., Mack, M.C., Davydov, S., Frenzel, P., Frolking, S. 2014. Shift of thermokarst lakes from carbon sources to sinks during the Holocene epoch. Nature, v. 511, p. 452-456, DOI: 10.1038/nature13560.

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Year Published: 2014

Calibration of a conodont apatite-based Ordovician 87Sr/86Sr curve to biostratigraphy and geochronology: Implications for stratigraphic resolution

The Ordovician 87Sr/86Sr isotope seawater curve is well established and shows a decreasing trend until the mid-Katian. However, uncertainties in calibration of this curve to biostratigraphy and geochronology have made it difficult to determine how the rates of 87Sr/86Sr decrease may have varied, which has implications for both the...

Saltzman, M. R.; Edwards, C. T.; Leslie, S. A.; Dwyer, Gary S.; Bauer, J. A.; Repetski, John E.; Harris, A. G.; Bergstrom, S. M.
GSA Bulletin; November/December 2014; v. 126;no. 11/12; p. 1551-1568.

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Year Published: 2014

A field trip guidebook to the type localities of Marland Billings' 1935 Paleozoic bedrock stratigraphy near Littleton, New Hampshire

Marland Billings' classic paper published in 1937 in the Geological Society of America Bulletin established a succession of six stratigraphic units in rocks of low metamorphic grade near Littleton, New Hampshire. The two youngest units are fossiliferous in the area, with ages established at the time as “middle” Silurian and Early Devonian....

Rankin, Douglas W.; Rankin, Mary B.
A field trip guidebook to the type localities of Marland Billings' 1935 Paleozoic bedrock stratigraphy near Littleton, New Hampshire; 2014; OFR; 2014-1026; Rankin, Douglas W.; Rankin, Mary B.

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Year Published: 2014

Karst geomorphology and hydrology of the Shenandoah Valley near Harrisonburg, Virginia

The karst of the central Shenandoah Valley has characteristics of both shallow and deep phreatic formation. This field guide focuses on the region around Harrisonburg, Virginia, where a number of these karst features and their associated geologic context can be examined. Ancient, widespread alluvial deposits cover much of the carbonate bedrock on...

Doctor, Daniel H.; Orndorff, Wil; Maynard, Joel; Heller, Matthew J.; Casile, Gerolamo C.
Doctor, D.H., Orndorff, W., Maynard, J., Heller, M.J., and Casile, G.C., 2014, Karst geomorphology and hydrology of the Shenandoah Valley near Harrisonburg, Virginia, in Bailey, C.M., and Coiner, L.V., eds., Elevating Geoscience in the Southeastern United States: New Ideas about Old Terranes—Field Guides for the GSA Southeastern Section Meeting, Blacksburg, Virginia, 2014: Geological Society of America Field Guide 35, p. 161–213, doi:10.1130/2014.0035(06).

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Year Published: 2014

Late Holocene vegetation, climate, and land-use impacts on carbon dynamics in the Florida Everglades

Tropical and subtropical peatlands are considered a significant carbon sink. The Florida Everglades includes 6000-km2 of peat-accumulating wetland; however, detailed carbon dynamics from different environments within the Everglades have not been extensively studied or compared. Here we present carbon accumulation rates from 13 cores and 4...

Jones, Miriam C.; Bernhardt, Christopher E.; Willard, Debra A.
Jones, M.C., Bernhardt, C., Willard, D., 2014. Late Holocene vegetation, climate, and land-use impacts on carbon dynamics in the Florida Everglades. Quaternary Science Reviews, v. 90, p. 90-105, DOI: 10.1016/j.quascirev.2014.02.010.

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Year Published: 2014

A deglacial and Holocene record of climate variability in south-central Alaska from stable oxygen isotopes and plant macrofossils in peat

We used stable oxygen isotopes derived from bulk peat (δ18OTOM), in conjunction with plant macrofossils and previously published carbon accumulation records, in a ∼14,500 cal yr BP peat core (HT Fen) from the Kenai lowlands in south-central Alaska to reconstruct the climate history of the area. We find that patterns are broadly...

Jones, Miriam C.; Wooller, Matthew J.; Peteet, Dorothy M.
Jones, M.C., Wooller, M., Peteet, D.M. 2014. A deglacial and Holocene record of climate variability in south-central Alaska from stable oxygen isotopes and plant macrofossils in peat: Quaternary Science Reviews, v. 87, p. 1-11, DOI: 10.1016/j.quascirev.2013.12.025.

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Year Published: 2014

Can uncertainties in sea ice albedo reconcile patterns of data-model discord for the Pliocene and 20th/21st centuries?

General Circulation Model simulations of the mid-Pliocene warm period (mPWP, 3.264 to 3.025 Myr ago) currently underestimate the level of warming that proxy data suggest existed at high latitudes, with discrepancies of up to 11°C for sea surface temperature estimates and 17°C for surface air temperature estimates. Sea ice has a strong...

Howell, Fergus W.; Haywood, Alan M.; Dolan, Aisling M.; Dowsett, Harry J.; Francis, Jane E; Hill, Daniel J.; Pickering, Steven J.; Pope, James O.; Salzmann, Ulrich; Wade, Bidget S
Howell, F.W., Haywood, A.M., Dolan, A.M., Dowsett, H.J., Francis, J.E., Hill, D.J., Pickering, S.J., Pope, J.O., Salzmann, U., and Wade, B.S., 2014, Can uncertainties in sea ice albedo reconcile patterns of data-model discord for the Pliocene and 20th/21st centuries?: Geophysical Research Letters, v. 41, no. 6, p. 2011-2018.

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Year Published: 2014

Evaluating CO2 and CH4 dynamics of Alaskan ecosystems during the Holocene Thermal Maximum

The Arctic has experienced much greater warming than the global average in recent decades due to polar amplification. Warming has induced ecological changes that have impacted climate carbon-cycle feedbacks, making it important to understand the climate and vegetation controls on carbon (C) dynamics. Here we used the Holocene Thermal Maximum (HTM...

He, Yujie; Jones, Miriam C.; Zhuang, Qianlai; Bochicchio, Christopher; Felzer, B. S.; Mason, Erik; Yu, Zicheng
He, Y., Jones, M.C. Zhuang, Q., Bochichio, C., Felzer, B.S., Mason, E., Yu, Z. 2014. Evaluating CO2 and CH4 dynamics of Alaskan ecosystems during the Holocene Thermal Maximum: Quaternary Science Reviews, v. 86, p. 63-77, doi: 10.1016/j.quascirev.2013.12.019.

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Year Published: 2014

The conodont Iapetognathus and its value for defining the base of the Ordovician System

Nicoll et al. (1999, Brigham Young University Geology Studies 44, 27–101) published the taxonomy of species of the ramiform conodont Iapetognathus Landing in Fortey et al. (1982, The Cambrian–Ordovician boundary: sections, fossil distributions, and correlations, National Museum of Wales, Geological Series No. 3...

Miller, J. E.; Repetski, John E.; Nicoll, R. S.; Nowlan, G. S.; Ethington, R. L.
Miller, J.F., Repetski, J.E., Nicoll, R.S., Nowlan, Godfrey, and Ethington, R.L., 2014, The conodont Iapetognathus and its value for defining the base of the Ordovician System: GFF, vol. 136, No. 1, p. 185-188.

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Year Published: 2014

Conflict diamonds as an example of natural resource conflict

No abstract available.

Tomes, Robert; Tucker, Chris; Murdock, Darryl; Chirico, Peter G.; Malpeli, Katherine C.
Conflict diamonds as an example of natural resource conflict; 2014; Book chapter; Monograph; Human Geography: Socio-Cultural Dynamics and Challenges to Global Security; Chirico, Pete; Malpeli, Katherine C.