Florence Bascom Geoscience Center

Publications

Filter Total Items: 385
Publication Thumbnail
Year Published: 2014

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.
Easton, R.M., Catuneaunu, O., Donovan, A.D., Fluegeman, R.H., Hamblin, H.H., Lasca. N.P., Morrow, J.R. Orndorff, R.C., Sadler, P., Scott, R.W., Tew, B.H., 2014, North American Commission on Stratigraphic Nomenclature, Note 66--Records of Stratigraphic Commission, 2003-2013: Stratigraphy, v. 11, no. 2, p. 143-157.

Publication Thumbnail
Year Published: 2014

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.

Publication Thumbnail
Year Published: 2014

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.
A geological synthesis of the Precambrian shield in Madagascar; 2014; Article; Journal; Journal of African Earth Sciences; Tucker, Robert D.; Roig, J. Y.; Moine, B.; Delor, C.; Peters, S. G.

Publication Thumbnail
Year Published: 2013

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.
Martha L. Growdon, Michael J. Kunk, Robert P. Wintsch and Gregory J. Walsh Telescoping metamorphic isograds: Evidence from 40Ar/39Ar dating in the Orange-Milford belt, southern Connecticut American Journal of Science 313(10):1017-1053

Publication Thumbnail
Year Published: 2013

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
Andrew C. Kemp, Benjamin P. Horton, Christopher H. Vane, Christopher E. Bernhardt, D. Reide Corbett, Simon E. Engelhart, Shimon C. Anisfeld, Andrew C. Parnell, Niamh Cahill, Sea-level change during the last 2500 years in New Jersey, USA, Quaternary Science Reviews, Volume 81, 1 December 2013, Pages 90-104

Publication Thumbnail
Year Published: 2013

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.
Reconnaissance investigation of the rough diamond resource potential and production capacity of Côte d’Ivoire; 2013; SIR; 2013-5185; Chirico, Peter G.; Malpeli, Katherine C.

Publication Thumbnail
Year Published: 2013

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.
Bedrock geologic and joint trend map of the Pinardville quadrangle, Hillsborough County, New Hampshire; 2013; OFR; 2013-1027; Burton, William C.; Armstrong, Thomas R.

Publication Thumbnail
Year Published: 2013

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.
Cronin, T. M., L. Polyak, D. Reed, E. S. Kandiano, R. E. Marzen, E.A. Council. 2013. A 600-kyr Arctic Sea-Ice Record from Mendeleev Ridge based on Ostracodes. Quaternary Science Reviews 79, 157-167.

Publication Thumbnail
Year Published: 2013

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.
The influence of geomorphology on the role of women at artisanal and small-scale mine sites; 2013; Article; Journal; Natural Resources Forum; Malpeli, Katherine C.; Chirico, Peter G.

Publication Thumbnail
Year Published: 2013

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
Ronald J. LitwinEmail authorJoseph P. SmootMilan J. PavichErik ObergBrent Steury,Ben Helwig,Helaine W. MarkewichVincent L. Santucci, Geoffrey Sanders Rates and Probable Causes of Freshwater Tidal Marsh Failure, Potomac River Estuary, Northern Virginia, USA Wetlands (2013) 33: 1037. doi:10.1007/s13157-013-0461-6

Publication Thumbnail
Year Published: 2013

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.

Publication Thumbnail
Year Published: 2013

The origin of conodonts and of vertebrate mineralized skeletons

Conodonts are an extinct group of jawless vertebrates whose tooth-like elements are the earliest instance of a mineralized skeleton in the vertebrate lineage, inspiring the ‘inside-out’ hypothesis that teeth evolved independently of the vertebrate dermal skeleton and before the origin of jaws. However, these propositions have been...

Murdock, Duncan J.E.; Dong, Xi-Ping; Repetski, John E.; Marone, Federica; Stampanoni, Marco; Donoghue, Philip C.J.
Murdock, D.J.E., Dong, X.P., Repetski, J.E., Marone, F., Sampanoni M., and Donoghue, P.C.J., 2013, The origin of conodonts and of vertebrate mineralized skeletons: Nature, v. 502, p. 546-549, doi:10.1038/nature12645