Florence Bascom Geoscience Center

Publications

Filter Total Items: 384
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Year Published: 2012

Cambrian-lower Middle Ordovician passive carbonate margin, southern Appalachians: Chapter 14

The southern Appalachian part of the Cambrian–Ordovician passive margin succession of the great American carbonate bank extends from the Lower Cambrian to the lower Middle Ordovician, is as much as 3.5 km (2.2 mi) thick, and has long-term subsidence rates exceeding 5 cm (2 in.)/k.y. Subsiding depocenters separated by arches controlled...

Read, J. Fred; Repetski, John E.
Cambrian-lower Middle Ordovician passive carbonate margin, southern Appalachians; 2013; Article; Book; The great American carbonate bank: the geology and economic resources of the Cambrian – Ordovician Sauk megasequence of Laurentia (AAPG Memoir 98); Read, J. F.; Repetski, J. E.

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Year Published: 2012

Climate variability during the Medieval Climate Anomaly and Little Ice Age based on ostracod faunas and shell geochemistry from Biscayne Bay, Florida: Chapter 14

An 800-year-long environmental history of Biscayne Bay, Florida, is reconstructed from ostracod faunal and shell geochemical (oxygen, carbon isotopes, Mg/Ca ratios) studies of sediment cores from three mudbanks in the central and southern parts of the bay. Using calibrations derived from analyses of modern Biscayne and Florida Bay ostracods,...

Cronin, Thomas M.; Wingard, G. Lynn; Dwyer, Gary S.; Swart, Peter K.; Willard, Debra A.; Albietz, Jessica
Climate variability during the Medieval Climate Anomaly and Little Ice Age based on ostracod faunas and shell geochemistry from Biscayne Bay, Florida; 2012; Article; Book; Ostracoda as proxies for quaternary climate change (Developments in Quaternary Sciences); Cronin, T. M.; Wingard, G. L.; Dwyer, G. S.; Swart, P. K.; Willard, D. A.; Albeitz, J.

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Year Published: 2012

Digital outcrop model of stratigraphy and breccias of the southern Franklin Mountains, El Paso, Texas

This chapter reviews and synthesizes the lithostratigraphy, biostratigraphy, chronostratigraphy, and breccia types of the southwestern part of the great American carbonate bank in the southern Franklin Mountains (SFM), El Paso, Texas. Primary stratigraphic units of focus are the Lower Ordovician El Paso and Upper Ordovician Montoya Groups. These...

Derby, James R.; Fritz, R.D.; Longacre, S.A.; Morgan, W.A.; Sternbach, C.A.; Bellian, Jerome A.; Kerans, Charles; Repetski, John E.
Digital outcrop model of stratigraphy and breccias of the southern Franklin Mountains, El Paso, Texas; 2013; Article; Book; The great American carbonate bank: the geology and economic resources of the Cambrian – Ordovician Sauk megasequence of Laurentia (AAPG Memoir 98); Belian, J. A.; Kerans, Charles ; Repetski, J. E.

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Year Published: 2012

Magnetostratigraphy susceptibility for the Guadalupian Series GSSPs (Middle Permian) in Guadalupe Mountains National Park and adjacent areas in West Texas

Here we establish a magnetostratigraphy susceptibility zonation for the three Middle Permian Global boundary Stratotype Sections and Points (GSSPs) that have recently been defined, located in Guadalupe Mountains National Park, West Texas, USA. These GSSPs, all within the Middle Permian Guadalupian Series, define (1) the base of the Roadian Stage (...

Wardlaw, Bruce R.; Ellwood, Brooks B.; Lambert, Lance L.; Tomkin, Jonathan H.; Bell, Gordon L.; Nestell, Galina P.
Magnetostratigraphy susceptibility for the Guadalupian Series GSSPs (Middle Permian) in Guadalupe Mountains National Park and adjacent areas in West Texas; 2012; Article; Journal; Geological Society, London, Special Publications; Wardlaw, Bruce R.; Ellwood, Brooks, B.; Lambert, Lance L.; Tomkin, Jonathan H.; Bell, Gordon, L.; Nestell, Galina P.

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Year Published: 2012

Neoproterozoic tectonic evolution of the Jebel Saghro and Bou Azzer - El Graara inliers, eastern and central Anti-Atlas, Morocco

New mapping, geochemistry, and 17 U–Pb SHRIMP zircon ages from rocks of the Sirwa, Bou Azzer–El Graara, and Jebel Saghro inliers constrain the Neoproterozoic evolution of the eastern Anti-Atlas during Pan-African orogenesis. In the Sirwa inlier, Tonian quartzite from the pre Pan-African passive margin deposits of the Mimount Formation contains...

Walsh, Gregory J.; Aleinikoff, John N.; Harrison, Richard W.; Burton, William C.; Quick, James E.; Benziane, Foudad; Yazidi, Abdelaziz; Saadane, Abderrahim
Neoproterozoic tectonic evolution of the Jebel Saghro and Bou Azzer - El Graara inliers, eastern and central Anti-Atlas, Morocco; 2012; Article; Journal; Precambrian Research; Gregory J Walsh;John N Aleinikoff;Richard W Harrison;William C Burton;James E Quick;Benziane, Foudad;Yazidi, Abdelaziz;Saadane, Abderrahim

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Year Published: 2012

On the causes of mid-Pliocene warmth and polar amplification

The mid-Pliocene (~ 3 to 3.3 Ma ago), is a period of sustained global warmth in comparison to the late Quaternary (0 to ~ 1 Ma ago), and has potential to inform predictions of long-term future climate change. However, given that several processes potentially contributed, relatively little is understood about the reasons for the observed warmth, or...

Lunt, Daniel J.; Haywood, Alan M.; Schmidt, Gavin A.; Salzmann, Ulrich; Valdes, Paul J.; Dowsett, Harry J.; Loptson, Claire A.
On the causes of mid-Pliocene warmth and polar amplification; 2012; Article; Journal; Earth and Planetary Science Letters; Lunt, Daniel J.; Haywood, Alan M.; Schmidt, Gavin A.; Salzmann, Valdes, Paul J.; Dowsett, Harry J.; Loptson, Claire A.

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Year Published: 2012

Ordovician of the Sauk megasequence in the Ozark region of northern Arkansas and parts of Missouri and adjacent states: Chapter 11

Exposures of Ordovician rocks of the Sauk megasequence in Missouri and northern Arkansas comprise Ibexian and lower Whiterockian carbonates with interspersed sandstones. Subjacent Cambrian strata are exposed in Missouri but confined to the subsurface in Arkansas. The Sauk-Tippecanoe boundary in this region is at the base of the St. Peter Sandstone...

Ethington, Raymond L.; Repetski, John E.; Derby, James R.
Ordovician of the Sauk megasequence in the Ozark region of northern Arkansas and parts of Missouri and adjacent states; 2013; Article; Book; The great American carbonate bank: the geology and economic resources of the Cambrian – Ordovician Sauk megasequence of Laurentia (AAPG Memoir 98); Ethington, R. L.; Repetski, J. E.; Derby, J. R.

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Year Published: 2012

Spatial analysis of geologic and hydrologic features relating to sinkhole occurrence in Jefferson County, West Virginia

In this study the influence of geologic features related to sinkhole susceptibility was analyzed and the results were mapped for the region of Jefferson County, West Virginia. A model of sinkhole density was constructed using Geographically Weighted Regression (GWR) that estimated the relations among discrete geologic or hydrologic features and...

Doctor, Daniel H.; Doctor, Katarina Z.
Doctor, Daniel H. and Doctor, Katarina Z., Spatial analysis of geologic and hydrologic features relating to sinkhole occurrence in Jefferson County, West Virginia, Carbonates and Evaporites, vol. 27, no.2, p. 143–152.

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Year Published: 2012

The Middle Ordovician Knox unconformity in the Black Warrior Basin

Analysis of well core and cuttings from the Black Warrior Basin in Mississippi reveals the presence of a Middle Ordovician (Whiterockian) erosional unconformity interpreted to be equivalent to the well-known Knox-Beekmantown unconformity in eastern North America. The unconformity occurs at the top of a peritidal dolostone unit known informally as...

Dwyer, Gary S.; Repetski, John E.
The Middle Ordovician Knox unconformity in the Black Warrior Basin; 2013; Article; Book; The great American carbonate bank: the geology and economic resources of the Cambrian – Ordovician Sauk megasequence of Laurentia (AAPG Memoir 98); Dwyer, Gary S.; Repetski, J. E.

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Year Published: 2012

The Neoacadian orogenic core of the souther Appalachians: a Geo-traverse through the migmatitic inner Piedmont from the Brushy Mountains to Lincolnton, North Carolina

The Inner Piedmont extends from North Carolina to Alabama and comprises the Neoacadian (360–345 Ma) orogenic core of the southern Appalachian orogen. Bordered to west by the Blue Ridge and the exotic Carolina superterrane to the east, the Inner Piedmont is cored by an extensive region of migmatitic, sillimanite-grade rocks. It is a composite...

Eppes, Martha Cary; Bartholomew, Mervin J.; Merschat, Arthur J.; Hatcher, Robert D.; Byars, Heather E.; Gilliam, William G.

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Year Published: 2011

Pliocene Model Intercomparison Project (PlioMIP): experimental design and boundary conditions (Experiment 2)

The Palaeoclimate Modelling Intercomparison Project has expanded to include a model intercomparison for the mid-Pliocene warm period (3.29 to 2.97 million yr ago). This project is referred to as PlioMIP (the Pliocene Model Intercomparison Project). Two experiments have been agreed upon and together compose the initial phase of PlioMIP. The first (...

Haywood, A.M.; Dowsett, H.J.; Robinson, M.M.; Stoll, D.K.; Dolan, A.M.; Lunt, D.J.; Otto-Bliesner, B.; Chandler, M.A.
Pliocene Model Intercomparison Project (PlioMIP): experimental design and boundary conditions (Experiment 2); 2011; Article; Journal; Geoscientific Model Development; Haywood, A. M.; Dowsett, H. J.; Robinson, M. M.; Stoll, D. K.; Dolan, A. M.; Lunt, D. J.; Otto-Bliesner, B. ; Chandler, M. A.

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Year Published: 2011

Conodont biostratigraphy and stable isotope stratigraphy across the Ordovician Knox/Beekmantown unconformity in the central Appalachians

Gutierrez-Marco, J.C.; Rabano, I.; Garcia-Bellido, D.; Leslie, Stephen A.; Saltzman, Matthew R.; Bergström, S. M.; Repetski, J.E.; Howard, A.; Seward, A.M.
Conodont biostratigraphy and stable isotope stratigraphy across the Ordovician Knox/Beekmantown unconformity in the central Appalachians; 2011; Article; Conference publication; Ordovician of the world: proceedings of the 11th International Symposium on the Ordovician System (Serie Cuadernos del Museo Geominero 14); Leslie, S. A.; Saltzman, M. R.; Bergström, S. M.; Repetski, J. E.; Howard, A. ; Seward, A. M.