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GEOREF RECORD

Refinement of late-early and middle Miocene diatom biostratigraphy for the East Coast of the United States

John A. Barron, James V. Browning, Peter Sugarman and Kenneth G. Miller
Refinement of late-early and middle Miocene diatom biostratigraphy for the East Coast of the United States
Geosphere (Boulder, CO) (August 2013) 9 (5): 1286-1302

Abstract

Integrated Ocean Drilling Program (IODP) Expedition 313 continuously cored Lower to Middle Miocene sequences at three continental shelf sites off New Jersey, USA. The most seaward of these, Site M29, contains a well-preserved Early and Middle Miocene succession of planktonic diatoms that have been independently correlated with the geomagnetic polarity time scale derived in studies from the equatorial and North Pacific. Shallow water diatoms (species of Delphineis, Rhaphoneis, and Sceptroneis) dominate in onshore sequences in Maryland and Virginia, forming the basis for the East Coast Diatom Zones (ECDZ). Integrated study of both planktonic and shallow water diatoms in Hole M29A as well as in onshore sequences in Maryland (the Baltimore Gas and Electric Company well) and Delaware (the Ocean Drilling Program Bethany Beach corehole) allows the refinement of ECDZ zones into a high-resolution biochronology that can be successfully applied in both onshore and offshore regions of the East Coast of the United States. Strontium isotope stratigraphy supports the diatom biochronology, although for much of the Middle Miocene it suggests ages that are on average 0.4 m.y. older. The ECDZ zonal definitions are updated to include evolutionary events of Delphineis species, and regional occurrences of important planktonic diatom marker taxa are included. Updated taxonomy, reference to published figures, and photographic images are provided that will aid in the application of this diatom biostratigraphy.


EISSN: 1553-040X
Serial Title: Geosphere (Boulder, CO)
Serial Volume: 9
Serial Issue: 5
Title: Refinement of late-early and middle Miocene diatom biostratigraphy for the East Coast of the United States
Affiliation: U. S. Geological Survey, Menlo Park, CA, United States
Pages: 1286-1302
Published: 20130814
Text Language: English
Publisher: Geological Society of America, Boulder, CO, United States
References: 44
Accession Number: 2013-070793
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Includes appendices
Illustration Description: illus. incl. 5 tables, sketch map
N39°31'10" - N39°31'10", W73°24'48" - W73°24'48"
Secondary Affiliation: Rutgers, The State University of New Jersey, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201342
Program Name: USGSOPNon-USGS publications with USGS authors
Program Name: ODPOcean Drilling Program
Program Name: IODPIntegrated Ocean Drilling Program
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