Arcgis Online Sites for Amino Acid Racemization and Other Geochronologic Data US Atlantic

ArcGIS online sites for Amino acid racemization and other geochronologic data – US Pacific and Atlantic coasts and coastal Peru

Additions June 21, 2016 August 14, 2017

This link goes to an online map that is a working compilation of AAR data for the mid-Atlantic and southeast-Atlantic coastal plain. See explanatory text associated with the on-line map.

Update April 13, 2016

Added link to manuscript about AAR data management. Contains links to other files listed below.

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Article title: AN EVOLVING DATABASE FOR QUATERNARY AMINOSTRATIGRAPHY
Reference: GRJ30
Journal title: GeoResJ
Corresponding author: Dr. John F. Wehmiller
First author: Dr. John F. Wehmiller
Final version published online: 27-MAR-2015
Full bibliographic details: GeoResJ (2015), pp. 115-123
DOI information: 10.1016/j.grj.2015.02.009

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For further information please contact John Wehmiller at

Note that the links that look like this ( will permit viewing additional information about the maps, including changing the basemaps on which the data are plotted.

PACIFICCOAST

Kennedy et al. 1982 (Nature) Pacific coast aminostratigraphy sites (two links to the same map)

Santa BarbaraCounty

Rockwell et al. 1992 SEPM volume (localities only- no data)

San DiegoCounty

Kern and Rockwell 1992 SEPM volume (localities and AAR data)

Channel Islands – Muhs et al.

U-Series coral dates, Pacific coast North America:

Peru (Hsu et al 1989)

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ATLANTICCOAST

All sites listed in the UD locality database (one link) - this now includes U-series, Sr, thin-section, 14C sites

Paired AAR-14C data US Atlantic coast

Atlantic coastal plain U-series data (two links to the same map)

This map contains citations to U-series data from the USGS lab, published in several articles between the late 1970’s and the early 1990’s (Szabo, Cronin et al., Mixon et al., Oldale et al., Muhs et al.). Data obtained more recently include those in Wehmiller et al. 2004 (Quaternary International) and unpublished results obtained on corals collected by

Wehmiller or Oches and analyzed at the University of Minnesota or Woods Hole Oceanographic Institute.

This link goes to jpg and pdf files of images and stratigraphic sections for four sites in SC, three of which have yielded U-series coral dates as described in Wehmiller et al. (2004).

OSL data:

Florida

(one link)

Florida:

This map has layers representing AAR data obtained by multiple laboratories using samples from multiple sources. It also includes U-series data obtained by Muhs et al. (1992) and Hollin and Hearty (1990). Luminescence and ESR data obtained by Burdette et al. are also included in the map, as are sites where Sr-isotope analyses have also been conducted on mollusks that were also analyzed for AAR. Most of the Sr-isotope data are unpublished, although those for sites in North Carolina were published in Wehmiller et al. (2012 – Quaternary Geochronology).

FLORIDADATA COMPILATION IN UDSPACE

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AtlanticMarginBeach and shelf sites with AAR data

Added June 9, 2015

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Poster presentation, 2015 GSA meeting, Baltimore:

RACEMIZATION-INFERRED AGE DISTRIBUTION OF MOLLUSKS IN THE US ATLANTIC MARGIN COASTAL SYSTEM

Abstract and link to poster pdf file:

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GOMEZ PIT, VIRGINIA BEACH, VA FILES

The sites below contain information directly related to the studies of Gomez Pit (Virginia Beach, VA) during the period from ~1982 to ~2005. Photographs from Gomez and other Atlantic coastal plain sites are also found within the Department of Geological Sciences site (

Descriptive text from Wehmiller (2013) summarizing Gomez Pit data (and data from other nearby sites)

New Light and Gomez Pit stratigraphic sections

Data and stratigraphy from June Mirecki’s MS and PhD work

NRC report – comparison of dating methods, Gomez Pit

Map of Gomez Pit with pdf “sticky notes” showing locations of major collection sites

WEB LINKS

November 7, 2013

J.F.WEHMILLER

NOAA-WDCAARLINK:

US ATLANTIC COASTAL PLAIN LINKS:

Carolinas:

Mid-Atlantic:

Florida:

U-series dates:

OSL and AAR data

WEHMILLER 2013 REVIEW PAPER – QUATERNARY GEOCHRONOLOGY

UNIVERSITY OF DELAWARE INSTITUTIONAL REPOSITORY (UDSPACE)

DEPARTMENT OF GEOLOGICAL SCIENCES COLLECTION:

FLORIDAAARDATA COMPILATION IN UDSPACE:

GOMEZ PIT, VIRGINIA BEACH, VA FILES IN UDSPACE:

The links below contain information directly related to the studies of Gomez Pit (Virginia Beach, VA) during the period from ~1982 to ~2005. Photographs from Gomez and other Atlantic coastal plain sites are also found within the Department of Geological Sciences site (

Descriptive text from Wehmiller (2013) summarizing Gomez Pit data (and data from other nearby sites)

New Light and Gomez Pit stratigraphic sections

Data and stratigraphy from June Mirecki’s MS and PhD work

NRC report – comparison of dating methods, Gomez Pit

Map of Gomez Pit with pdf “sticky notes” showing locations of major collection sites

This is a Google Earth file with the primary sampling locations from the Gomez Pit region. Note that the pit has changed so much that the current images do not portray the sampling sites from the 1980’s and 1990’s. In many cases, earlier site positions are also visible in this file but the larger icons are the ones to be relied upon.