noaa-other-10294
Albemarle Embayment Quaternary Aminostratigraphy
Wehmiller, J.F.; Thieler, E.R.; Miller, D.; Pellerito, V.; Bakeman Keeney, V.; Riggs, S.R.; Culver, S.; Mallinson, D.; Farrell, K.M.; York, L.L.; Pierson, J.; Parham, P.R.
Albemarle Embayment Quaternary Aminostratigraphy
2011-01-19
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/10294
Investigator
J.F.
Wehmiller
Investigator
E.R.
Thieler
Investigator
D.
Miller
Investigator
V.
Pellerito
Investigator
V.
Bakeman Keeney
Investigator
S.R.
Riggs
Investigator
S.
Culver
Investigator
D.
Mallinson
Investigator
K.M.
Farrell
Investigator
L.L.
York
Investigator
J.
Pierson
Investigator
P.R.
Parham
earth science
paleoclimate
others
geoscientificInformation
52000 cal yr BP
9680 cal yr BP
Complete
35.0184
36.0686
-76.3126
-75.7083
0
1
Continent
North America
United States Of America
North Carolina
OBX-02>LATITUDE 36.0686>LONGITUDE -75.7167
Continent
North America
United States Of America
North Carolina
OBX-03>LATITUDE 36.0507>LONGITUDE -75.7137
Continent
North America
United States Of America
North Carolina
MLD-03>LATITUDE 35.8724>LONGITUDE -75.7542
Continent
North America
United States Of America
North Carolina
MLD-01>LATITUDE 35.5089>LONGITUDE -76.0015
Continent
North America
United States Of America
North Carolina
OBX-01>LATITUDE 36.0094>LONGITUDE -75.7083
Continent
North America
United States Of America
North Carolina
MLD-02>LATITUDE 35.0184>LONGITUDE -76.3126
None
Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
Wehmiller, J.F., E.R. Thieler, D. Miller, V. Pellerito,
V. Bakeman Keeney, S.R. Riggs, S. Culver, D. Mallinson,
K.M. Farrell, L.L. York, J. Pierson, and P.R. Parham. 2010.
Aminostratigraphy of surface and subsurface Quaternary sediments,
North Carolina coastal plain, USA.
Quaternary Geochronology, Vol. 5, Issue 4, pp. 459-492,
August 2010.
The Quaternary stratigraphy and geochronology of the Albemarle
Embayment of the North Carolina (NC) Coastal Plain is examined
using amino acid racemization (AAR) in marine mollusks,
in combination with geophysical, lithologic, and biostratigraphic
analysis of 28 rotasonic cores drilled between 2002 and 2006.
The Albemarle Embayment is bounded by structural highs to the
north and south, and Quaternary strata thin westward toward
the Suffolk paleoshoreline, frequently referred to as the
Suffolk Scarp. The Quaternary section is up to ~90 m thick,
consists of a variety of estuarine, shelf, back-barrier,
and lagoonal deposits, and has been influenced by multiple
sea-level cycles. The temporal resolution of the amino acid
racemization method is tested statistically and with the
stratigraphic control provided by this geologic framework,
and it is then applied to the correlation and age estimation
of subsurface units throughout the region. Over 500 specimens
(primarily Mercenaria and Mulinia) from the subsurface section
have been analyzed using either gas chromatographic (GC)
or reverse-phase liquid chromatographic (RPLC) techniques.
The subsurface stratigraphic data are compared with AAR results
from numerous natural or excavated exposures from the surrounding
region, as well as results from NC beach collections, to develop
a comprehensive aminostratigraphic database for the entire
Quaternary record within the NC coastal system. Age mixing,
recognized in the beach collections, is also seen in subsurface
sections, usually where major seismic reflections or core lithology
indicate the presence of stratigraphic discontinuities.
Kinetic models for racemization are tested within the regional
stratigraphic framework, using either radiocarbon or U-series
calibrations or comparison with regional biostratigraphy.
Three major Pleistocene aminozones [AZ2, AZ3, and AZ4] are found
throughout the region, all being found in superposition in several
cores. Each can be subdivided, yielding a total of at least eight
stratigraphically and statistically distinct aminozones.
Kinetic modeling, supplemented with local calibration, indicates
that these aminozones represent depositional events ranging from
~80 ka to nearly 2 Ma. Three prominent seismic reflections are
interpreted to represent the base of the early, middle, and late
Pleistocene, respectively, roughly 2 Ma, 800 ka, and 130 ka.
The large number of samples and the available stratigraphic control
provide new insights into the capabilities and limitations of
aminostratigraphic methods in assessing relative and numerical ages
of Atlantic Coastal Plain Quaternary deposits.
STUDY NOTES: Extent of Racemization (D/L) data for mollusks from Pleistocene
and Holocene subsurface sections sampled by rotasonic coring of
Quaternary strata in the Albemarle Embayment, North Carolina
Coastal Plain.
Samples prepared and analyzed at the University of Delaware,
Newark DE, Lab PI John F. Wehmiller.
Samples collected and prepared between 2002 and 2007.
Pretreatment: Fragments cut from shell valves; surface cleaning
with dental tools; dilute HCl and distilled water wash; air dry
AA fraction="amino fraction"
Hydrolysis procedure: 6N HCl 22 hours 105 deg C
Bleach: No
Instrumental programming: GC temperature program; RPLC buffer gradient
Blank corrections: no
Response factors: no
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/aar/wehmiller2010albemarle/wehmiller2010albemarle.xls
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/aar/wehmiller2010albemarle/wehmiller2010albemarle.txt
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11