Publications
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Preliminary geologic map of the Stanardsville 7.5' quadrangle, Greene and Madison Counties, Virginia
The Stanardsville 7.5-minute quadrangle is located about 30 kilometers north of Charlottesville, Virginia, in the eastern foothills of the Blue Ridge and within the Blue Ridge physiographic province. The quadrangle contains a small part of the eastern margin of Shenandoah National Park along Saddleback Mountain just north of Swift Run Gap and stretches of Swift Run and the South, Conway, and Rapi
Authors
William C. Burton, Christopher M. Bailey, E. Allen Crider
A transect through the base of the Bronson Hill Terrane in western New Hampshire
This trip will present the preliminary results of ongoing bedrock mapping in the North Hartland and Claremont North 7.5-minute quadrangles in western New Hampshire. The trip will travel from the Lebanon pluton to just north of the Sugar River pluton (Fig. 1) with the aim of examining the lower structural levels of the Bronson Hill anticlinorium (BHA), and the nature of the boundary with the rocks
Authors
Gregory J. Walsh, Peter M. Valley, Karri R. Sicard
Chronostratigraphic framework for the IODP Expedition 318 cores from the Wilkes Land Margin: Constraints for paleoceanographic reconstruction
The Integrated Ocean Drilling Program Expedition 318 to the Wilkes Land margin of Antarctica recovered a sedimentary succession ranging in age from lower Eocene to the Holocene. Excellent stratigraphic control is key to understanding the timing of paleoceanographic events through critical climate intervals. Drill sites recovered the lower and middle Eocene, nearly the entire Oligocene, the Miocene
Authors
L. Tauxe, C.E. Stickley, S. Sugisaki, P.K. Bijl, S. M. Bohaty, H. Brinkhuis, C. Escutia, J.A. Flores, A.J.P. Houben, M. Iwai, F. Jiménez-Espejo, R. McKay, S. Passchier, J. Pross, Christina Riesselman, U. Röhl, F. Sangiorgi, K. Welsh, A. Klaus, A. Fehr, J.A.P. Bendle, R. Dunbar, J. Gonzàlez, T. Hayden, K. Katsuki, M.P. Olney, S.F. Pekar, P.K. Shrivastava, T. van de Flierdt, T. Williams, M. Yamane
Patterns and controlling factors of species diversity in the Arctic Ocean
Aim The Arctic Ocean is one of the last near-pristine regions on Earth, and, although human activities are expected to impact on Arctic ecosystems, we know very little about baseline patterns of Arctic Ocean biodiversity. This paper aims to describe Arctic Ocean-wide patterns of benthic biodiversity and to explore factors related to the large-scale species diversity patterns.Location Arctic Ocea
Authors
Moriaki Yasuhara, Gene Hunt, Gert van Dijken, Kevin R. Arrigo, Thomas M. Cronin, Jutta E. Wollenburg
Stable isotope evidence for glacial lake drainage through the St. Lawrence Estuary, eastern Canada, ~13.1-12.9 ka
Postglacial varved and rhythmically-laminated clays deposited during the transition from glacial Lake Vermont (LV) to the Champlain Sea (CS) record hydrological changes in the Champlain-St. Lawrence Valley (CSLV) at the onset of the Younger Dryas ∼13.1–12.9 ka linked to glacial lake drainage events. Oxygen isotope (δ18O) records of three species of benthic foraminifera (Cassidulina reniforme, Hayn
Authors
T. M. Cronin, J.A. Rayburn, J.-P. Guilbault, R. Thunell, D.A. Franzi
Florida Bay salinity and Everglades wetlands hydrology circa 1900 CE: A compilation of paleoecology-based statistical modeling analyses
Throughout the 20th century, the Greater Everglades Ecosystem of south Florida was greatly altered by human activities. Construction of water-control structures and facilities altered the natural hydrologic patterns of the south Florida region and consequently impacted the coastal ecosystem. Restoration of the Greater Everglades Ecosystem is guided by the Comprehensive Everglades Restoration Plan
Authors
F.E. Marshall, G.L. Wingard
Latitudinal species diversity gradient of marine zooplankton for the last three million years
High tropical and low polar biodiversity is one of the most fundamental patterns characterising marine ecosystems, and the influence of temperature on such marine latitudinal diversity gradients is increasingly well documented. However, the temporal stability of quantitative relationships among diversity, latitude and temperature is largely unknown. Herein we document marine zooplankton species di
Authors
Moriaki Yasuhara, Gene Hunt, Harry J. Dowsett, Marci M. Robinson, Danielle K. Stoll
Short-term survival of ammonites in New Jersey after the end-Cretaceous bolide impact
A section containing the Cretaceous/Paleogene (= Cretaceous/Tertiary) boundary in Monmouth County, New Jersey, preserves a record of ammonites extending from the end of the Cretaceous into possibly the beginning of the Danian. The section includes the upper part of the Tinton Formation and lower part of the Hornerstown Formation. The top of the Tinton Formation is represented by a richly fossilife
Authors
Neil H. Landman, Matthew P. Garb, Remy Rovelli, Denton S. Ebel, Lucy E. Edwards
Standardizing texture and facies codes for a process-based classification of clastic sediment and rock
Proposed here is a universally applicable, texturally based classification of clastic sediment that is independent from composition, cementation, and geologic environment, is closely allied to process sedimentology, and applies to all compartments in the source-to-sink system. The classification is contingent on defining the term "clastic" so that it is independent from composition or origin and i
Authors
K.M. Farrell, W.B. Harris, D. J. Mallinson, S.J. Culver, S.R. Riggs, J. Pierson, J.C. Lautier
Igneous activity, metamorphism, and deformation in the Mount Rogers area of SW Virginia and NW North Carolina: A geologic record of Precambrian tectonic evolution of the southern Blue Ridge Province
Mesoproterozoic basement in the vicinity of Mount Rogers is characterized by considerable lithologic variability, including major map units composed of gneiss, amphibolite, migmatite, meta-quartz monzodiorite and various types of granitoid. SHRIMP U-Pb geochronology and field mapping indicate that basement units define four types of occurrences, including (1) xenoliths of ca. 1.33 to ≥1.18 Ga age,
Authors
Richard P. Tollo, John N. Aleinikoff, Roland Mundil, C. Scott Southworth, Michael A. Cosca, Douglas W. Rankin, Allison E. Rubin, Adrienne Kentner, Christopher A. Parendo, Molly S. Ray
Antarctic and Southern Ocean influences on Late Pliocene global cooling
The influence of Antarctica and the Southern Ocean on Late Pliocene global climate reconstructions has remained ambiguous due to a lack of well-dated Antarctic-proximal, paleoenvironmental records. Here we present ice sheet, sea-surface temperature, and sea ice reconstructions from the ANDRILL AND-1B sediment core recovered from beneath the Ross Ice Shelf. We provide evidence for a major expansion
Authors
Robert McKay, Tim Naish, Lionel Carter, Christina Riesselman, Robert Dunbar, Charlotte Sjunneskog, Diane Winter, Francesca Sangiorgi, Courtney Warren, Mark Pagani, Stefan Schouten, Veronica Willmott, Richard Levy, Robert DeConto, Ross D. Powell