Publications
Filter Total Items: 900
Digital and preliminary bedrock geologic map of the Pico Peak quadrangle, Vermont Digital and preliminary bedrock geologic map of the Pico Peak quadrangle, Vermont
No abstract available.
Authors
Gregory J. Walsh, Nicholas M. Ratcliffe
Paleozoic orogens in New England, USA Paleozoic orogens in New England, USA
Stratigraphy and isotope geochronology in the crystalline core of the Appalachians suggest revised interpretations of the extent, nature and timing of Paleozoic orogens in New England. Five major episodes of magmatism, deformation, and high-grade regional metamorphism are recognized: Taconian (455-442 Ma), Acadian (423-385 Ma), Neo-Acadian (366-350 Ma), Late Pennsylvanian (300-290 Ma)...
Authors
Peter Robinson, Robert D. Tucker, Dwight Bradley, H. N. Berry, P. H. Osberg
Ground-water discharge and base-flow nitrate loads of nontidal streams, and their relation to a hydrogeomorphic classification of the Chesapeake Bay watershed, middle Atlantic Coast Ground-water discharge and base-flow nitrate loads of nontidal streams, and their relation to a hydrogeomorphic classification of the Chesapeake Bay watershed, middle Atlantic Coast
Existing data on base-flow and groundwater nitrate loads were compiled and analyzed to assess the significance of groundwater discharge as a source of the nitrate load to nontidal streams of the Chesapeake Bay watershed. These estimates were then related to hydrogeomorphic settings based on lithology and physiographic province to provide insight on the areal distribution of ground-water...
Authors
L. Joseph Bachman, Bruce D. Lindsey, John W. Brakebill, David S. Powars
Biostratigraphy and physical stratigraphy of the USGS-Cannon Park core (CHN-800), Charleston County, South Carolina Biostratigraphy and physical stratigraphy of the USGS-Cannon Park core (CHN-800), Charleston County, South Carolina
No abstract avavilable.
Authors
Laurel M. Bybell, Kevin J. Conlon, Lucy E. Edwards, N. O. Frederiksen, Gregory Gohn, Jean Self-Trail
Preliminary paleontologic report on cores 19A and 19B, from Russell Bank, Everglades National Park, Florida Bay Preliminary paleontologic report on cores 19A and 19B, from Russell Bank, Everglades National Park, Florida Bay
The fauna and flora preserved in two cores, 19A and 19B, from the south side of Russell Bank (N 25 03.831', W 80 37.486') in north-central Florida Bay, Everglades National Park, Florida, record a history of environmental change over the last century. The benthic foraminifera and molluscs indicate fluctuating salinities with increasing average salinity upcore in core 19B. Shifts from low...
Authors
G. L. Brewster-Wingard, S. E. Ishman, Debra A. Willard, Lucy E. Edwards, C. W. Holmes
Pliocene-Quaternary geology of northern New Jersey; road log and description of field stops, Sunday June 1, 1997 Pliocene-Quaternary geology of northern New Jersey; road log and description of field stops, Sunday June 1, 1997
No abstract available.
Authors
Ron W. Witte, Jack B. Epstein, John Wright
Pliocene-Quaternary geology of northern New Jersey: Guidebook - Annual reunion of the northeastern friends of the Pleistocene field conference Pliocene-Quaternary geology of northern New Jersey: Guidebook - Annual reunion of the northeastern friends of the Pleistocene field conference
No abstract available.
Authors
Ron W. Witte, Gail M. Ashley, Jack B. Epstein, Richard K. Shaw, John Wright, Scott D. Stanford
Stratigraphy and regional significance of Mississippian to Jurassic rocks in Sierra Santa Teresa, Sonora, Mexico Stratigraphy and regional significance of Mississippian to Jurassic rocks in Sierra Santa Teresa, Sonora, Mexico
No abstract available.
Authors
John H. Stewart, Ricardo Amaya-Martinez, Robert G. Stamm, Bruce R. Wardlaw, George D. Stanley, Calvin H. Stevens
Digital bedrock geologic map of the Mount Holly and Ludlow quadrangles, Vermont, and explanation of the bedrock geology database in the Vermont Geographic Information System, 1994 Digital bedrock geologic map of the Mount Holly and Ludlow quadrangles, Vermont, and explanation of the bedrock geology database in the Vermont Geographic Information System, 1994
U.S. Geological Survey
Authors
Gregory J. Walsh, Nicholas M. Ratcliffe, John B. Dudley, Thomas Merrifield
Application of the Modern Analog Technique (MAT) of sea surface temperature estimation to middle Pliocene North Pacific planktonic foraminifer assemblages Application of the Modern Analog Technique (MAT) of sea surface temperature estimation to middle Pliocene North Pacific planktonic foraminifer assemblages
Seventy-two samples from Deep Sea Drilling Project Sites 445 and 463 and Ocean Drilling Program Site 769 from the northwest Pacific Ocean were compared to 499 modern core top Pacific Ocean samples using the squared chord distance dissimilarity measure. Many samples show high levels of dissimilarity that can be explained by pervasive dissolution and/or evolution changing the composition...
Authors
Harry J. Dowsett, Marci M. Robinson
Late Paleocene and early Eocene calcareous nannofossils from three boreholes in an onshore-offshore transect from New Jersey to the Atlantic Continental Rise Late Paleocene and early Eocene calcareous nannofossils from three boreholes in an onshore-offshore transect from New Jersey to the Atlantic Continental Rise
Closely spaced, upper Paleocene and lower Eocene samples from three boreholes near Clayton, NJ, at Island Beach, NJ, and at Site 605 on the Atlantic Ocean continental rise were examined for their calcareous nannofossil content. This study documents calcareous nannofossil occurrences in Zones NP9 and NP10 and identifies biostratigraphically useful species, presents unexpected upbasin...
Authors
Laurel M. Bybell, Jean Self-Trail