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Papers by Lauck Ward

Research paper thumbnail of Abstract: Biostratigraphy and Paleoecology of Lower Paleozoic, Upper Cretaceous, and Lower Tertiary Rocks in U. S. Geological Survey New Madrid Test Holes 1 and 1-X, Southeastern Missouri

Research paper thumbnail of Miocene Calvert and Choptank Formations in Inner Coastal Plain of Virginia: A Record of Marine Onlap and Late Cenozoic Deformation: ABSTRACT

Research paper thumbnail of Stratigraphy of Yorktown (Lower and Middle Pliocene) and Chowan River (Upper Pliocene) Formations in Southeastern Virginia: ABSTRACT

Research paper thumbnail of Lee Creek Mine. Aurora, North Carolina. Mining operations, geology, stratigraphy and paleontology. A synthesis

Research paper thumbnail of Late Pliocene and Early Pleistocene Mollusca from the James City and Chowan River Formations at the Lee Creek Mine

Smithsonian Contributions to Paleobiology

A molluscan fauna consisting of 194 species is described from the Chowan River (upper Pliocene) a... more A molluscan fauna consisting of 194 species is described from the Chowan River (upper Pliocene) and James City (lower Pleistocene) formations at the Lee Creek Mine, Aurora, North Carolina. These two formations are as much as 7 m thick in the mine and unconformably overlie strata that correlate with the Yorktown Formation in its type area. The Chowan River and James City formations are separated by an unconformity. The mollusks of the Chowan River Formation are assigned to the Glycymeris hummi-Turritella perexilis assemblage-zone and the mollusks in the overlying James City Formation are assigned to the Marvacrassatella kauffmani-Astarte berryi assemblage-zone. Although mollusks in these zones lived in a subtropical thermal regime, they include some warm-temperate species not found in contemporaneous deposits farther south. The units represented by these assemblage zones were deposited mostly under open marine conditions at a maximum depth of about 25 m. The Marvacrassatella kauffman...

Research paper thumbnail of Stratigraphic revision of the middle Eocene, Oligocene, and lower Miocene; Atlantic Coastal Plain of North Carolina

Research paper thumbnail of A gar-bitten vertebrate coprolite from the Neogene of the Atlantic Coastal Plain, USA, and a new ichnospecies of Machichnus Mikuláš et al., 2006

Research paper thumbnail of Age of Marine Mollusks from the Lower Miocene Pollack Farm Site , Delaware , Determined by 87 SR / 86 SR Geochronology 1

Analyses of 87Sr/86Sr ratios in the shells of marine bivalve mollusks from the Pollack Farm Site ... more Analyses of 87Sr/86Sr ratios in the shells of marine bivalve mollusks from the Pollack Farm Site in Kent County, Delaware, indicate that the fossils represent an early Miocene assemblage which lived about 17.9 ± 0.5 Ma. Faunal similarities, as well as Sr-isotopic data, support a correlation between the fossils at the Pollack Site and portions of the Kirkwood Formation to the north (New Jersey) and to the south the Fairhaven Member of the Calvert Formation (Maryland), the Pungo River Formation (North Carolina), and the Chipola Formation (Florida). A strong marine-nonmarine link with terrestrial vertebrates of the Hemingfordian North American Land Mammal Age is also suggested. 1 In Benson. R.N., ed., 1998, Geology and paleontology of the lower Miocene Pollack Farm Fossil Site, Delaware: Delaware Geological Survey Special Publication No. 21, p. 21–25. 2 Florida Museum of Natural History, University of Florida, Gainesville, FL 32611 3 Virginia Museum of Natural History, 1001 Douglas Ave...

Research paper thumbnail of Outline of tertiary stratigraphy and depositional history of the U.S. Atlantic Coastal Plain

Research paper thumbnail of Stratigraphy of the Calvert, Choptank, and St. Marys Formations (Miocene) in the Chesapeake Bay area, Maryland and Virginia

Research paper thumbnail of Age and Stratigraphic Correlation of the Raysor Formation, Late Pliocene. South Carolina

Tulane Studies in Geology and Paleontology, 2017

Mollusks and foraminifers from the type section of the Raysor Formation in the Coastal Plain of S... more Mollusks and foraminifers from the type section of the Raysor Formation in the Coastal Plain of South Carolina were obtained from collections in the National Museum of Natural History. Smithsonian Institution, Washington, D.C., and the Charleston Museum, Charleston, South Carolina. Analysis of the molluscan taxa shows the unit to be correlative With the Rushmere and Morgarts Beach Members of the Yorktown Formation in Virginia and North Carolina. Planktic foraminifers in the Raysor indicate an equivalency with Blow's (1969) Zone N20 [= Berggren, et al. (1983) Zone PL3]: this equivalency would suggest that the unit is lower upper Pliocene. The Raysor was deposited on a shallow shelf in a setting that was temperate at first, but which quickly warmed to subtropical.

Research paper thumbnail of Upper Cretaceous and Cenozoic Geology of the Southeastern Atlantic Coastal Plain: Atlanta, Georgia to Chesapeake, Virginia July 1–9, 1989

Research paper thumbnail of The Cretaceous and Tertiary stratigraphy of the Upper Coastal Plain of South Carolina

Upper Cretaceous and Cenozoic Geology of the Southeastern Atlantic Coastal Plain: Atlanta, Georgia to Chesapeake, Virginia July 1–9, 1989, 1989

Research paper thumbnail of Tertiary stratigraphy of the central Virginia Coastal Plain

Upper Cretaceous and Cenozoic Geology of the Southeastern Atlantic Coastal Plain: Atlanta, Georgia to Chesapeake, Virginia July 1–9, 1989, 1989

Research paper thumbnail of Molluscan biostratigraphy of the Miocene

Research paper thumbnail of Temporal Calibration and Correlation of Fossiliferous Neogene Strata in Florida, Maryland and Delaware Using Strontium Isotopes

The Paleontological Society Special Publications

Research paper thumbnail of Description of high-resolution seismic reflection data collected in Albemarle and Croatan sounds, North Carolina (cruise NE-82-1)

Research paper thumbnail of Stratigraphic revision of upper Miocene and lower Pliocene beds of the Chesapeake Group, middle Atlantic Coastal Plain

Research paper thumbnail of Chesapecten, a new genus of Pectinidae (Mollusca, Bivalvia) from the Miocene and Pliocene of eastern North America

Research paper thumbnail of Late Tertiary Evolution of Salisbury Embayment: ABSTRACT

Research paper thumbnail of Abstract: Biostratigraphy and Paleoecology of Lower Paleozoic, Upper Cretaceous, and Lower Tertiary Rocks in U. S. Geological Survey New Madrid Test Holes 1 and 1-X, Southeastern Missouri

Research paper thumbnail of Miocene Calvert and Choptank Formations in Inner Coastal Plain of Virginia: A Record of Marine Onlap and Late Cenozoic Deformation: ABSTRACT

Research paper thumbnail of Stratigraphy of Yorktown (Lower and Middle Pliocene) and Chowan River (Upper Pliocene) Formations in Southeastern Virginia: ABSTRACT

Research paper thumbnail of Lee Creek Mine. Aurora, North Carolina. Mining operations, geology, stratigraphy and paleontology. A synthesis

Research paper thumbnail of Late Pliocene and Early Pleistocene Mollusca from the James City and Chowan River Formations at the Lee Creek Mine

Smithsonian Contributions to Paleobiology

A molluscan fauna consisting of 194 species is described from the Chowan River (upper Pliocene) a... more A molluscan fauna consisting of 194 species is described from the Chowan River (upper Pliocene) and James City (lower Pleistocene) formations at the Lee Creek Mine, Aurora, North Carolina. These two formations are as much as 7 m thick in the mine and unconformably overlie strata that correlate with the Yorktown Formation in its type area. The Chowan River and James City formations are separated by an unconformity. The mollusks of the Chowan River Formation are assigned to the Glycymeris hummi-Turritella perexilis assemblage-zone and the mollusks in the overlying James City Formation are assigned to the Marvacrassatella kauffmani-Astarte berryi assemblage-zone. Although mollusks in these zones lived in a subtropical thermal regime, they include some warm-temperate species not found in contemporaneous deposits farther south. The units represented by these assemblage zones were deposited mostly under open marine conditions at a maximum depth of about 25 m. The Marvacrassatella kauffman...

Research paper thumbnail of Stratigraphic revision of the middle Eocene, Oligocene, and lower Miocene; Atlantic Coastal Plain of North Carolina

Research paper thumbnail of A gar-bitten vertebrate coprolite from the Neogene of the Atlantic Coastal Plain, USA, and a new ichnospecies of Machichnus Mikuláš et al., 2006

Research paper thumbnail of Age of Marine Mollusks from the Lower Miocene Pollack Farm Site , Delaware , Determined by 87 SR / 86 SR Geochronology 1

Analyses of 87Sr/86Sr ratios in the shells of marine bivalve mollusks from the Pollack Farm Site ... more Analyses of 87Sr/86Sr ratios in the shells of marine bivalve mollusks from the Pollack Farm Site in Kent County, Delaware, indicate that the fossils represent an early Miocene assemblage which lived about 17.9 ± 0.5 Ma. Faunal similarities, as well as Sr-isotopic data, support a correlation between the fossils at the Pollack Site and portions of the Kirkwood Formation to the north (New Jersey) and to the south the Fairhaven Member of the Calvert Formation (Maryland), the Pungo River Formation (North Carolina), and the Chipola Formation (Florida). A strong marine-nonmarine link with terrestrial vertebrates of the Hemingfordian North American Land Mammal Age is also suggested. 1 In Benson. R.N., ed., 1998, Geology and paleontology of the lower Miocene Pollack Farm Fossil Site, Delaware: Delaware Geological Survey Special Publication No. 21, p. 21–25. 2 Florida Museum of Natural History, University of Florida, Gainesville, FL 32611 3 Virginia Museum of Natural History, 1001 Douglas Ave...

Research paper thumbnail of Outline of tertiary stratigraphy and depositional history of the U.S. Atlantic Coastal Plain

Research paper thumbnail of Stratigraphy of the Calvert, Choptank, and St. Marys Formations (Miocene) in the Chesapeake Bay area, Maryland and Virginia

Research paper thumbnail of Age and Stratigraphic Correlation of the Raysor Formation, Late Pliocene. South Carolina

Tulane Studies in Geology and Paleontology, 2017

Mollusks and foraminifers from the type section of the Raysor Formation in the Coastal Plain of S... more Mollusks and foraminifers from the type section of the Raysor Formation in the Coastal Plain of South Carolina were obtained from collections in the National Museum of Natural History. Smithsonian Institution, Washington, D.C., and the Charleston Museum, Charleston, South Carolina. Analysis of the molluscan taxa shows the unit to be correlative With the Rushmere and Morgarts Beach Members of the Yorktown Formation in Virginia and North Carolina. Planktic foraminifers in the Raysor indicate an equivalency with Blow's (1969) Zone N20 [= Berggren, et al. (1983) Zone PL3]: this equivalency would suggest that the unit is lower upper Pliocene. The Raysor was deposited on a shallow shelf in a setting that was temperate at first, but which quickly warmed to subtropical.

Research paper thumbnail of Upper Cretaceous and Cenozoic Geology of the Southeastern Atlantic Coastal Plain: Atlanta, Georgia to Chesapeake, Virginia July 1–9, 1989

Research paper thumbnail of The Cretaceous and Tertiary stratigraphy of the Upper Coastal Plain of South Carolina

Upper Cretaceous and Cenozoic Geology of the Southeastern Atlantic Coastal Plain: Atlanta, Georgia to Chesapeake, Virginia July 1–9, 1989, 1989

Research paper thumbnail of Tertiary stratigraphy of the central Virginia Coastal Plain

Upper Cretaceous and Cenozoic Geology of the Southeastern Atlantic Coastal Plain: Atlanta, Georgia to Chesapeake, Virginia July 1–9, 1989, 1989

Research paper thumbnail of Molluscan biostratigraphy of the Miocene

Research paper thumbnail of Temporal Calibration and Correlation of Fossiliferous Neogene Strata in Florida, Maryland and Delaware Using Strontium Isotopes

The Paleontological Society Special Publications

Research paper thumbnail of Description of high-resolution seismic reflection data collected in Albemarle and Croatan sounds, North Carolina (cruise NE-82-1)

Research paper thumbnail of Stratigraphic revision of upper Miocene and lower Pliocene beds of the Chesapeake Group, middle Atlantic Coastal Plain

Research paper thumbnail of Chesapecten, a new genus of Pectinidae (Mollusca, Bivalvia) from the Miocene and Pliocene of eastern North America

Research paper thumbnail of Late Tertiary Evolution of Salisbury Embayment: ABSTRACT

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