Florence Bascom Geoscience Center

Publications

Filter Total Items: 533
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Year Published: 2016

Geologic evolution of the lower Connecticut River valley: Influence of bedrock geology, glacial deposits, and sea level

This fieldtrip illustrates the character of the lower Connecticut River bedrock valley, in particular its depth, and the lithology and structure of bedrock units it crosses. It examines the character and distribution of the glaciodeltaic terraces that partially fill the valley and discusses the depth of postglacial incision into them.

Stone, Janet Radway; Lewis, Ralph S.
Geologic Evolution of the Lower Connecticut River Valley: Influence of Bedrock Geology, Glacial Deposits, and Sea Level Geological Society of Connecticut

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Year Published: 2016

Climate change

Climate change (including climate variability) refers to regional or global changes in mean climate state or in patterns of climate variability over decades to millions of years often identified using statistical methods and sometimes referred to as changes in long-term weather conditions (IPCC, 2012). Climate is influenced by changes in continent...

Cronin, Thomas M.
Cronin, T. M., 2015, Climate Change. In, M. Kennish (ed.), Encyclopedia of Estuaries, doi:10.1007/978-94-017-8801-4, Springer Science+Business Media Dordrecht.

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Year Published: 2016

Cenozoic sea level and the rise of modern rimmed atolls

Sea-level records from atolls, potentially spanning the Cenozoic, have been largely overlooked, in part because the processes that control atoll form (reef accretion, carbonate dissolution, sediment transport, vertical motion) are complex and, for many islands, unconstrained on million-year timescales. Here we combine existing observations of...

Toomey, Michael; Ashton, Andrew; Raymo, Maureen E.; Perron, J. Taylor

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Year Published: 2016

Sensitivity of Pliocene Arctic climate to orbital forcing, atmospheric CO2 and sea ice albedo parameterisation

General circulation model (GCM) simulations of the mid-Pliocene Warm Period (mPWP, 3.264 to 3.025 Myr ago) do not reproduce the magnitude of Northern Hemisphere high latitude surface air and sea surface temperature (SAT and SST) warming that proxy data indicate. There is also large uncertainty regarding the state of sea ice cover in the mPWP....

Howell, Fergus W.; Haywood, Alan M.; Dowsett, Harry J.; Pickering, Steven J.

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Year Published: 2016

Proposed Auxiliary Boundary Stratigraphic Section and Point (ASSP) for the base of the Ordovician System at Lawson Cove, Utah, USA

The Global boundary Stratotype Section and Point (GSSP) for the base of the Ordovician System is at the First Appearance Datum (FAD) of the conodont Iapetognathus fluctivagus at Green Point in Newfoundland, Canada. Strata there are typical graptolitic facies that were deposited near the base of the continental slope.We propose establishing an...

Miller, James F.; Evans, Kevin R.; Ethington, Raymond L.; Freeman, Rebecca; Loch, James D.; Repetski, John E.; Ripperdan, Robert; Taylor, John F.
James F. Miller, Raymond L. Ethington, Kevin R. Evans, Rebecca L. Freeman, James D. Loch, John E. Repetski, Robert L. Ripperdan, and John F. Taylor, 2015, PROPOSAL TO ESTABLISH AN AUXILIARY BOUNDARY STRATIGRAPHIC SECTION AND POINT (ASSP) FOR THE BASE OF THE ORDOVICIAN SYSTEM AT LAWSON COVE, UTAH, USA: Stratigraphy, vol. 12, nos. 3-4, figs. 1 - 14, p. 219-236.

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Year Published: 2016

A multiagency and multijurisdictional approach to mapping the glacial deposits of the Great Lakes region in three dimensions

The Great Lakes Geologic Mapping Coalition (GLGMC), consisting of state geological surveys from all eight Great Lakes states, the Ontario Geological Survey, and the U.S. Geological Survey, was conceived out of a societal need for unbiased and scientifically defensible geologic information on the shallow subsurface, particularly the delineation,...

Berg, Richard C.; Brown, Steven E.; Thomason, Jason F.; Hasenmueller, Nancy R.; Letsinger, Sally L.; Kincare, Kevin A.; Esch, John M.; Kehew, Alan E.; Thorleifson, L. Harvey; Kozlowski, Andrew L.; Bird, Brian C.; Pavey, Richard R.; Bajc, Andy F.; Burt, Abigail K.; Fleeger, Gary M.; Carson, Eric C.
Berg, R.C., Brown, S.E., Thomason, J.F., Hasenmueller, N.R., Letsinger, S.L., Kincare, K.A., Esch, J.M., Kehew, A.E., Thorleifson, L.H., Kozlowski, A.L., Bird, B.C., Pavey, R.R., Bajc, A.F., Burt, A.K., Fleeger, G.M., and Carson, E.C., 2016, A multiagency and multijurisdictional approach to mapping the glacial deposits of the Great Lakes region in three dimensions, in Wessel, G.R., and Greenberg, J.K., eds., Geoscience for the Public Good and Global Development: Toward a Sustainable Future: Geological Society of America Special Paper 520

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Year Published: 2016

The Pliocene Model Intercomparison Project (PlioMIP) Phase 2: Scientific objectives and experimental design

The Pliocene Model Intercomparison Project (PlioMIP) is a co-ordinated international climate modelling initiative to study and understand climate and environments of the Late Pliocene, as well as their potential relevance in the context of future climate change. PlioMIP examines the consistency of model predictions in simulating Pliocene climate...

Haywood, Alan M.; Dowsett, Harry J.; Dolan, Aisling M.; Rowley, David; Abe-Ouchi, Ayako; Otto-Bliesner, Bette; Chandler, Mark A.; Hunter, Stephen J.; Lunt, Daniel J.; Pound, Matthew; Salzmann, Ulrich

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Year Published: 2016

The “Anthropocene” epoch: Scientific decision or political statement?

The proposal for the “Anthropocene” epoch as a formal unit of the geologic time scale has received extensive attention in scientific and public media. However, most articles on the Anthropocene misrepresent the nature of the units of the International Chronostratigraphic Chart, which is produced by the International Commission on...

Finney, Stanley C.; Edwards, Lucy E.
GSA Today, v. 26, no. 3–4

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Year Published: 2016

Reevaluating the age of the Walden Creek Group and the kinematic evolution of the western Blue Ridge, southern Appalachians

An integrated synthesis of existing datasets (detailed geologic mapping, geochronologic, paleontologic, geophysical) with new paleontologic and geochemical investigations of rocks previously interpreted as part of the Neoproterozoic Walden Creek Group in southeastern Tennessee suggest a necessary reevaluation of the kinematics and structural...

Thigpen, J. Ryan; Hatcher, Robert D.; Kah, Linda C.; Repetski, John E.

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Year Published: 2016

Integrating geological archives and climate models for the mid-Pliocene warm period

The mid-Pliocene Warm Period (mPWP) offers an opportunity to understand a warmer-than-present world and assess the predictive ability of numerical climate models. Environmental reconstruction and climate modelling are crucial for understanding the mPWP, and the synergy of these two, often disparate, fields has proven essential in confirming...

Haywood, Alan M.; Dowsett, Harry J.; Dolan, Aisling M.

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Year Published: 2016

The Laramide Caborca orogenic gold belt of northwestern Sonora, Mexico; white mica 40Ar/39Ar geochronology from gold-rich quartz veins

Introduction This report contains reduced 40Ar/39Ar geochronological data from 63 hydrothermal white mica samples separated from orogenic gold-rich quartz veins in the Laramide Caborca orogenic gold belt (COGB) of northwestern Sonora, Mexico. The main objective of this report is to present the sample locations, 40Ar/39Ar experimental methodology,...

Izaguirre, Aldo; Kunk, Michael J.; Iriondo, Alexander; McAleer, Ryan J.; Caballero-Martinez, Juan Antonio; Espinosa-Arámburu, Enrique
Izaguirre, Aldo, Kunk, M.J., Iriondo, Alexander, McAleer, Ryan, Caballero-Martínez, J.A, and Espinosa Arámburu, Enrique, 2016, The Laramide Caborca orogenic gold belt of northwestern Sonora, Mexico; white mica 40Ar/39Ar geochronology from gold-rich quartz veins: U.S. Geological Survey Open-File Report 2016–1008, 30 p., http://dx.doi.org/10.3133/ofr20161008.