Florence Bascom Geoscience Center
Publications
Conflict diamonds as an example of natural resource conflict
No abstract available.
Tomes, Robert; Tucker, Chris; Murdock, Darryl; Chirico, Peter G.; Malpeli, Katherine C. North American Commission on Stratigraphic Nomenclature Note 66: records of Stratigraphic Commission, 2003-2013
Note 66 summarizes activities of the North American Commission on Stratigraphic Nomenclature (NACSN) from November 2003 to October 2013 and is condensed from the minutes of the NACSN’s 58th to 68th annual meetings1. The purposes of the Commission are to develop statements of stratigraphic principles,recommend procedures applicable to the...
Easton, Robert M.; Catuneanu, Octavian; Donovan, Art D.; Fluegeman, Richard H.; Hamblin, A.P.; Harper, Howard; Lasca, Norman P.; Morrow, Jared R.; Orndorff, Randall C.; Sadler, Peter; Scott, Robert W.; Tew, Berry H. Stratigraphy, structure and regional correlation of eastern Blue Ridge sequences in southern Virginia and northwestern North Carolina: an interim report from new USGS mapping
Examination of key outcrops in the eastern Blue Ridge in southern Virginia and northwestern North Carolina is used to evaluate existing stratigraphic and structural models. Recent detailed mapping along the Blue Ridge Parkway and the eastern flank of the Mount Rogers massif provides the opportunity to (1) evaluate legacy data and interpretations...
Carter, Mark W.; Merschat, Arthur J. A geological synthesis of the Precambrian shield in Madagascar
Available U–Pb geochronology of the Precambrian shield of Madagascar is summarized and integrated into a synthesis of the region’s geological history. The shield is described in terms of six geodynamic domains, from northeast to southwest, the Bemarivo, Antongil–Masora, Antananarivo, Ikalamavony, Androyan–Anosyan, and Vohibory domains. Each domain...
Tucker, Robert D.; Roig, J.Y.; Moine, B.; Delor, C.; Peters, S.G. Telescoping metamorphic isograds: Evidence from 40Ar/39A dating in the Orange-Milford belt, southern Connecticut
New 40Ar/39Ar ages for hornblende and muscovite from the Orange-Milford belt in southern Connecticut reflect cooling from Acadian amphibolite facies metamorphism between ∼380 to 360 Ma followed by retrograde recrystallization of fabric-forming muscovite and chlorite during lower greenschist facies Alleghanian transpression at ∼280 Ma. Reported...
Kunk, Michael J.; Walsh, Gregory J. ; Growdon, Martha L.; Wintsch, Robert P. Sea-level change during the last 2500 years in New Jersey, USA
Relative sea-level changes during the last ∼2500 years in New Jersey, USA were reconstructed to test if late Holocene sea level was stable or included persistent and distinctive phases of variability. Foraminifera and bulk-sediment δ13C values were combined to reconstruct paleomarsh elevation with decimeter precision from sequences of salt-marsh...
Kemp, Andrew C.; Horton, Benjamin P.; Vane, Christopher H.; Bernhardt, Christopher E.; Corbett, D. Reide; Engelhart, Simon E.; Anisfeld, Shimon C.; Parnell, Andrew C.; Cahill, Niamh
Reconnaissance investigation of the rough diamond resource potential and production capacity of Côte d’Ivoire
Ethnic and political conflict developed into open civil war in Côte d’Ivoire in 2002, leading to a de facto partitioning of the country into the government-controlled south and the rebel-controlled north. Côte d’Ivoire’s two main diamond mining areas, Séguéla and Tortiya, are located in the north, under what was, until recently, rebel-controlled...
Chirico, Peter G.; Malpeli, Katherine C.
Bedrock geologic and joint trend map of the Pinardville quadrangle, Hillsborough County, New Hampshire
The bedrock geology of the Pinardville quadrangle includes the Massabesic Gneiss Complex, exposed in the core of a regional northeast-trending anticlinorium, and highly deformed metasedimentary rocks of the Rangeley Formation, exposed along the northwest limb of the anticlinorium. Both formations were subjected to high-grade metamorphism and...
Burton, William C.; Armstrong, Thomas R. A 600-ka Arctic sea-ice record from Mendeleev Ridge based on ostracodes
Arctic paleoceanography and sea-ice history were reconstructed from epipelagic and benthic ostracodes from a sediment core (HLY0503-06JPC, 800 m water depth) located on the Mendeleev Ridge, Western Arctic Ocean. The calcareous microfaunal record (ostracodes and foraminifers) covers several glacial/interglacial cycles back to estimated Marine...
Cronin, Thomas M.; Polyak, L.V.; Reed, D.; Kandiano, E. S.; Marzen, R. E.; Council, E. A. The influence of geomorphology on the role of women at artisanal and small-scale mine sites
The geologic and geomorphic expressions of a mineral deposit determine its location, size, and accessibility, characteristics which in turn greatly influence the success of artisans mining the deposit. Despite this critical information, which can be garnered through studying the surficial physical expression of a deposit, the geologic and...
Malpeli, Katherine C.; Chirico, Peter G. Rates and probable causes of freshwater tidal marsh failure, Potomac River Estuary, Northern Virginia, USA
Dyke Marsh, a distal tidal marsh along the Potomac River estuary, is diminishing rapidly in areal extent. This study documents Dyke Marsh erosion rates from the early-1860s to the present during pre-mining, mining, and post-mining phases. From the late-1930s to the mid-1970s, Dyke Marsh and the adjacent shallow riverbottom were mined for gravel,...
Litwin, Ronald J.; Smoot, Joseph P.; Pavich, Milan J.; Markewich, Helaine Walsh; Oberg, Erik T.; Steury, Brent W.; Helwig, Ben; Santucci, Vincent L.; Sanders, Geoffrey The Sunny Point Formation: a new Upper Cretaceous subsurface unit in the Carolina Coastal Plain
This paper formally defines the Sunny Point Formation, a new Upper Cretaceous subsurface unit confined to the outer Atlantic Coastal Plain of North and South Carolina. Its type section is established in corehole NH-C-1-2001 (Kure Beach) from New Hanover County, North Carolina. The Sunny Point Formation consists of light-olive-gray to greenish-gray...
Balson, Audra E.; Self-Trail, Jean M.; Terry, Dennis O.