A review of the aminostratigraphy of Quaternary mollusks from United States Atlantic Coastal Plain sites

Wehmiller, John F.; Belknap, Daniel F.; Boutin, Brian S.; Mirecki, June E.; Rahaim, Stephen D.; York, Linda L.

doi:10.1130/spe227-p69

Cited by 30 publications

(44 citation statements)

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“…Information is given for uranium content, 232 Th (as an indicator of initial 230 Th and 231 Pa), 230 Th/ 238 U and/or 231 Pa/ 235 U ages, and initial 234 U/ 238 U (derived from the measured 234 U/ 238 U and the 230 Th/ 238 U age). Corrected ages are calculated by ARTICLE IN PRESS Cronin et al (1981), Mixon et al (1982), Szabo (1985), and Wehmiller et al (1988). Approximate positions of shoreline features (scarps) as mapped by Oaks et al (1974): H-F=Hickory-Fentress scarp; Sflk=Suffolk Scarp.…”

Section: Resultsmentioning

confidence: 99%

“…The samples are from one site in southeastern Virginia, one in northeastern North Carolina, two in central South Carolina, and one in Georgia. These samples were collected with mollusks that are part of ongoing studies of amino acid racemization geochemistry/geochronology at these and other related localities (Wehmiller et al, 1988(Wehmiller et al, , 1992Mirecki et al, 1995). In no case have new collections been made at the precise location of previous analyses, although in at least two cases the new collections very closely duplicate collections made in the late 1970's and early 1980's (McCartan et al, 1982Szabo, 1985).…”

Section: Introductionmentioning

confidence: 99%

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Uranium-series coral ages from the US Atlantic Coastal Plain–the “80ka problem” revisited

Wehmiller

Simmons

Cheng

et al. 2004

Quaternary International

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Uranium series coral ages for emergent units from the passive continental margin US Atlantic Coastal Plain (ACP) suggest sea level above present levels at the end of marine oxygen isotope stage (MIS) 5, contradicting age-elevation relations based on marine isotopic or coral reef models of ice equivalent sea level. We have reexamined this problem by obtaining high precision 230 Th/ 238 U and 231 Pa/ 235 U thermal ionization mass spectrometric ages for recently collected and carefully cleaned ACP corals, many in situ. We recognize samples that show no evidence for diagenesis on the basis of uranium isotopic composition and age concordance. Combining new and earlier data, among those ages close to or within the age range of MIS 5, over 85% cluster between 65 and 85 ka BP. Of the corals that we have analyzed, those that show the least evidence for diagenesis on the basis of uranium isotopic composition and age concordance have ages between 80 and 85 ka BP, consistent with a MIS 5a correlation. The units from which these samples have been collected are all emergent and have elevations within B3-5 m of those few units where early stage 5 (B125,000 ka BP) coral ages have been obtained. The ACP appears to record an unusual history of relative sea level throughout MIS 5, a history that is also apparent in the dated coral record for Bermuda. We speculate that this history is related to the regional (near-to intermediate-field) effects of ancestral Laurentide Ice sheets on last interglacial shorelines of the western North Atlantic.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Uranium-series coral ages from the US Atlantic Coastal Plain–the “80ka problem” revisited

Wehmiller

Simmons

Cheng

et al. 2004

Quaternary International

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“…It is chiefly of Sangamonian age (OIS-5) based on amino-acid ratios, but ratios of shells from other Long Island clays traditionally included in the Gardiners indicate that some are of older, pre-Sangamonian age (OIS-7?) (Stone & Borns 1986;Wehmiller et al 1988;Muller & Calkin 1993), and radiocarbon dates and pollen indicate that younger, middle Wisconsinan (OIS-3) marine sediments are also present (Sirkin & Stuckenrath 1980;Muller & Calkin 1993). Middle Wisconsinan deposits also occur on the New Jersey shelf up to an altitude of À15 m a.s.l.…”

Section: Middle and Late Pleistocene Glaciation And Interglacial Depomentioning

confidence: 99%

Onshore record of Hudson River drainage to the continental shelf from the late Miocene through the late Wisconsinan deglaciation, USA: synthesis and revision

Stanford¹

2009

Boreas

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Stanford, S. D. 2009: Onshore record of Hudson River drainage to the continental shelf from the late Miocene through the late Wisconsinan deglaciation, USA: synthesis and revision. Boreas, 10.1111/j.1502‐3885.2009.00106.x. ISSN 0300‐9483. Fluvial and glacial deposits in New Jersey, Long Island, and the Hudson valley provide a record of Hudson River drainage since the late Miocene. Late Miocene fluvial deposits record southerly flow across the emerged inner New Jersey shelf. In the late Miocene–early Pliocene this drainage incised, shifted southwesterly, and discharged to the shelf south of New Jersey. During late Pliocene or Early Pleistocene glaciation, discharge to the shelf in the New York City area was established. This drainage incised and stabilized in the Early and Middle Pleistocene and remained open during pre‐Wisconsinan (Oxygen Isotope Stage 6? (OIS‐6?)) and late Wisconsinan (OIS‐2) glacial advances. During late Wisconsinan retreat, moraine deposits dammed the valley at the Narrows to form Lake Albany. From 19 to 15.5 kyr BP (all dates in 14C yr), Hudson drainage was directed eastward into the Long Island Sound lowland. Drainage of Lake Wallkill into Lake Albany at 15.5 kyr BP breached the Narrows dam and initiated the unstable phase of Lake Albany, which was controlled by eroding spillways, first on the moraine dam, then on emerged lake‐bottom in the mid‐Hudson valley. Marine incursion between 12 and 11 kyr BP limited fluvial incision of the lake bottom, stabilizing the Quaker Springs, Coveville, and upper Fort Ann spillways. Lowering sea level between 11 and 10 kyr BP allowed incision from the upper to lower Fort Ann threshold. Sediment eroded by lake outflows between 15 and 10.5 kyr BP was trapped in the glacially deepened lower valley. Little inland sediment reached the shelf after 20 kyr BP.

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“…Detection was by flame ionization. These methods have all been routine in the Delaware lab for at least 15 yr (Wehmiller, 1984a(Wehmiller, , 1984bWehmiller et al, 1988). High-pressure liquid chromatographic methods (HPLC) were not employed in this study because they yield data for only one amino acid, D-alloisoleucine/L-isoleucine, which is a relatively slow-racemizing amino acid.…”

Section: Methodsmentioning

confidence: 99%

Data Report: Amino acid racemization geochronological studies of selected Leg 155 samples

Wehmiller¹,

Hall²

1997

Proceedings of the Ocean Drilling Program, 155 Scientific Results

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Amino acid racemization measurements have been conducted on selected samples from Ocean Drilling Program (ODP) Leg 155 to evaluate the utility of this method for geochronological purposes. Sample size limited the number of analyses, but samples that were successfully processed included one sample of Holocene age, one from oxygen isotope Substage 5e, and two pre-Substage 5e samples. These latter two samples appear to be Stage 7 age, possibly Stage 9. One is from a disturbed zone that could include specimens of different ages. Geothermal heating effects on racemization are potentially significant for these samples and require further evaluation.

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A review of the aminostratigraphy of Quaternary mollusks from United States Atlantic Coastal Plain sites

Cited by 30 publications

References 0 publications

Uranium-series coral ages from the US Atlantic Coastal Plain–the “80ka problem” revisited

Uranium-series coral ages from the US Atlantic Coastal Plain–the “80ka problem” revisited

Onshore record of Hudson River drainage to the continental shelf from the late Miocene through the late Wisconsinan deglaciation, USA: synthesis and revision

Data Report: Amino acid racemization geochronological studies of selected Leg 155 samples

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