Publications
Filter Total Items: 829
Pacific Enewetak Atoll Crater Exploration (PEACE) Program; Enewetak Atoll, Republic of the Marshall Islands; part 2: Paleontology and biostratigraphy of Enewetak Atoll, Marshall Islands; application to OAK and KOA craters
No abstract available.
Authors
Thomas M. Cronin, Elisabeth M. Brouwers, Laurel M. Bybell, Lucy E. Edwards, T. Gibson, R. Margerum, R. Z. Poore
The Valley and Ridge Province of eastern Pennsylvania - Stratigraphic and sedimentologic contributions and problems
Many contributions that have led to a better understanding of Appalachian geology have resulted directly from work in the folded Appalachian Mountain and Great Valley sections of the Valley and Ridge physiographic province of eastern Pennsylvania. Disagreements have been common since H.D. Rogers first described the geology of the area in 1858. Many differing opinions still exist regarding the stra
Authors
Jack B. Epstein
Pleistocene glacial and interglacial stratigraphy of new England, Long Island, and adjacent georges bank and gulf of Maine
No abstract available.
Authors
B. D. Stone, H.W. Borns
Age of biostratigraphic horizons within the Ordovician and Silurian systems
Three samples that have a bearing on the age of horizons within the Ordovician and Silurian systems, two previously dated by the conventional K-Ar method and one by the 40Ar/39 Ar total-fusion method, have been reanalysed using the 40Ar/39Ar age-spectrum method. Conventional K-Ar and total-fusion 40Ar/39Ar ages can always be questioned because of the relative ease with which the K-Ar system can be
Authors
Michael J. Kunk, J. Sutter, J.D. Obradovich, Marvin A. Lanphere
Insights on why graphic correlation (Shaw's method) works: A reply
No abstract available.
Authors
Lucy E. Edwards
Foraminifers and calcareous nannofossils of Tertiary strata in Maryland and Virginia: A summary
No abstract available.
Authors
T. G. Gibson, Laurel M. Bybell
Guidebook for the annual field conference of Pennsylvania geologists: Geology of an accreted terrane; the eastern Hamburg Klippe and surrounding rocks, eastern Pennsylvania
No abstract available.
Authors
Peter T. Lyttle, Jack B. Epstein, Gary George Lash
Age of the Comfort Member of the Castle Hayne Formation, North Carolina
The biostratigraphic and chronostratigraphic position of the Comfort Member of the Castle Hayne Formation has been the subject of much debate. At the Martin-Marietta Quarry at Castle Hayne, New Hanover County, North Carolina, the planktic foraminifers indicate an assignment within an interval of the uppermost Turborotalia frontosa Zone to the Turborotalia pomeroli Zone. The calcareous nannofossils
Authors
J. E. Hazel, Laurel M. Bybell, Lucy E. Edwards, G. D. Jones, L. W. Ward
Ar40/Ar39 age spectrum dating of biotite from Middle Ordovician bentonites, eastern North America
No abstract available.
Authors
Michael J. Kunk, John F. Sutter
Significant unconformities and the hiatuses represented by them in the Paleogene of the Atlantic and Gulf Coastal Province
A biostratigraphic, chronostratigraphic, and magnetostratigraphic model has been calibrated to produce a new time scale for the Paleogene. The model gives the biostratigraphic position and duration represented by significant unconformities in three areas of the Atlantic and Gulf Coastal Province: 1) western and central Alabama; 2) South Carolina; and 3) central Virginia to southwestern Maryland. I
Authors
Joseph E. Hazel, Lucy E. Edwards, Laurel M. Bybell
Insights on why graphic correlation (Shaw's method) works
In 1964 A. B. Shaw presented a method of correlating fossiliferous sedimentary rocks based on interpretation of graphic plots of first- and last-occurrences of taxa. Because there is no way to determine the true total ranges of fossil taxa, it is instructive to test the accuracy of the method using hypothetical datasets. The dataset used here consists of 16 taxa in six sections with differing know
Authors
Lucy E. Edwards
Reworked Hantkenina speciments at Little Stave Creek, Alabama
The Eocene-Oligocene boundary in Mississippi and Alabama has been traditionally placed between the Shubuta Member of the Yazoo Formation and the overlying Red Bluff Formation (or its carbonate facies equivalent, the Bumpnose Formation). Consequently, the presence of Eocene planktonic foraminifers in the Red Bluff and Bumpnose has long been attributed to reworking. To test the validity of this hypo
Authors
Laurel M. Bybell, Richard Z. Poore