Publications
Filter Total Items: 891
40Ar/39Ar whole-rock data constraints on Acadian diagenesis and Alleghanian cleavage in the Martinsburg formation, eastern Pennsylvania 40Ar/39Ar whole-rock data constraints on Acadian diagenesis and Alleghanian cleavage in the Martinsburg formation, eastern Pennsylvania
A comparison of 40Ar/39Ar age spectra of whole-rock mudstone and slate samples from the Ordovician Martinsburg Formation at Lehigh Gap, Pennsylvania and stratigraphic and thermal constraints support Alleghanian age for regional slaty cleavage and a late Acadian age for diagenesis in these rocks. Age spectra from mud-stones have a sigmodal shape, with slopes that climb steeply from...
Authors
R. P. Wintsch, Michael J. Kunk, Jack B. Epstein
Digital bedrock geologic map of the Vermont part of the 7.5 x 15 minute Mount Ascutney and Springfield quadrangles, Vermont Digital bedrock geologic map of the Vermont part of the 7.5 x 15 minute Mount Ascutney and Springfield quadrangles, Vermont
No abstract available.
Authors
Gregory J. Walsh, Thomas R. Armstrong, N. M. Ratcliffe
Using hydrogeochemical methods to evaluate complex quaternary subsurface stratigraphy Block Island, Rhode Island, USA Using hydrogeochemical methods to evaluate complex quaternary subsurface stratigraphy Block Island, Rhode Island, USA
One of the major problems in hydrogeologic investigations of glaciated regions is the determination of complex stratigraphic relationships in the subsurface where insufficient information is available from drilling and geophysical records. In this paper, chemical characteristics of groundwater were used to identify stratigraphic changes in glacial deposits that were previously inferred...
Authors
A.I. Veeger, B. D. Stone
Preliminary report on the distribution of modern fauna and flora at selected sites in north-central and north-eastern Florida Bay Preliminary report on the distribution of modern fauna and flora at selected sites in north-central and north-eastern Florida Bay
No abstract available.
Authors
G. L. Brewster-Wingard, S. E. Ishman, Lucy E. Edwards, Debra A. Willard
Preliminary paleontologic report on core T-24, Little Madeira Bay, Florida Preliminary paleontologic report on core T-24, Little Madeira Bay, Florida
No abstract available.
Authors
S. E. Ishman, G. L. Brewster-Wingard, Debra A. Willard, Thomas M. Cronin, Lucy E. Edwards, C. W. Holmes
Geohydrology and potential water-supply development on Bumkin, Gallops, Georges, Grape, Lovell, and Peddocks Islands, eastern Massachusetts Geohydrology and potential water-supply development on Bumkin, Gallops, Georges, Grape, Lovell, and Peddocks Islands, eastern Massachusetts
An investigation of the geohydrology and of the potential for water-supply development on several of the Boston Harbor Islands, eastern Massachusetts, was conducted to evaluate the possibility of developing a permanent small-capacity water supply to support recreational activities, such as camping, hiking, and swimming. The Boston Harbor Islands, including Bumkin, Gallops, Georges, Grape...
Authors
John P. Masterson, Byron D. Stone, R.R. Rendigs
Preliminary analysis of down-core biotic assemblages Bob Allen Keys, Everglades National Park, Florida Bay Preliminary analysis of down-core biotic assemblages Bob Allen Keys, Everglades National Park, Florida Bay
Introduction A series of short piston cores ( 2m) were taken from eleven stations in Florida Bay in May, 1994 by researchers from the U.S. Geological Survey (St. Petersburg, FL., Woods Hole, MA., and Denver CO.) in cooperation with South Florida Water Management District, and the Everglades National Park, and the National Oceanic and Atmospheric Administration (NOAA). Core 6A from Bob...
Authors
G. L. Brewster-Wingard, S. E. Ishman, Thomas M. Cronin, Lucy E. Edwards, Debra A. Willard, R. B. Halley
Cretaceous and Paleogene calcareous nannofossil biostratigraphy of New Jersey Cretaceous and Paleogene calcareous nannofossil biostratigraphy of New Jersey
No abstract available.
Authors
Jean Self-Trail, Laurel M. Bybell
Stratigraphic notes, 1994: Three short papers propose changes in stratigraphic nomenclature in Virginia, Kentucky, and Alaska Stratigraphic notes, 1994: Three short papers propose changes in stratigraphic nomenclature in Virginia, Kentucky, and Alaska
No abstract available.
Authors
Jack B. Epstein, Randall C. Orndorff, Eugene K. Rader, Charles L. Rice, David A. Brew, Arthur B. Ford, Glen R. Himmelberg, James L. Drinkwater
Style and age of deformation, Carolina Slate Belt, central North Carolina Style and age of deformation, Carolina Slate Belt, central North Carolina
No abstract available.
Authors
Terry W. Offield, Michael J. Kunk, Robert P. Koeppen
The Pennsylvanian Fire Clay tonstein of the Appalachian basin—Its distribution, biostratigraphy, and mineralogy: Discussion and reply The Pennsylvanian Fire Clay tonstein of the Appalachian basin—Its distribution, biostratigraphy, and mineralogy: Discussion and reply
No abstract available.
Authors
William Outerbridge, C. L. Rice, Harvey E. Belkin, T.W. Henry, Michael J. Kunk
Composition of biotite phenocrysts in Ordovician tephras casts doubt on the proposed trans-Atlantic correlation of the Millbrig K-bentonite (United States) and the Kinnekulle K-bentonite (Sweden) Composition of biotite phenocrysts in Ordovician tephras casts doubt on the proposed trans-Atlantic correlation of the Millbrig K-bentonite (United States) and the Kinnekulle K-bentonite (Sweden)
Biotite phenocryst compositions in three thick, widespread Ordovician K-bentonites, the Deicke and Millbrig from Big Ridge, Alabama, and the Kinnekulle from Mossen, Västergötland, Sweden, fall into three distinct groups, and so the proposed intercontinental correlation of the Millbrig and the Kinnekulle is suspect. Because the biotites are nearly pristine compositionally, electron...
Authors
John T. Haynes, W.G. Melson, Michael J. Kunk