Evidence map›Paper›PMID 38123649›Full record

ArticleScientific reports2023

Platinum and microspherule peaks as chronostratigraphic markers for onset of the Younger Dryas at Wakulla Springs, Florida.

Christopher R Moore, Mark J Brooks, James S Dunbar, C Andrew Hemmings, Kurt A Langworthy, Allen West, Malcolm A LeCompte, Victor Adedeji, James P Kennett, James K Feathers

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Article in Scientific reports, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Christopher R MooreSouth Carolina Institute of Archaeology and Anthropology, University of South Carolina, P.O. Box 400, New Ellenton, SC, 29809, USA. MOORECR@mailbox.sc.edu.
Mark J BrooksSouth Carolina Institute of Archaeology and Anthropology, University of South Carolina, P.O. Box 400, New Ellenton, SC, 29809, USA.
James S DunbarAucilla Research Institute Inc., 555 North Jefferson Street, Monticello, FL, 32344, USA.
C Andrew HemmingsAucilla Research Institute Inc., 555 North Jefferson Street, Monticello, FL, 32344, USA.
Kurt A LangworthyCAMCOR, University of Oregon, 1443 E 13Th Ave, Eugene, OR, 97403, USA.
Allen WestComet Research Group, Prescott, AZ, USA.
Malcolm A LeCompteCenter of Excellence in Remote Sensing Education and Research, Elizabeth City State University, Elizabeth City, NC, 27909, USA.
Victor AdedejiDepartment of Natural Sciences, Elizabeth City State University, Elizabeth City, NC, 27909, USA.
James P KennettDepartment of Earth Science and Marine Science Institute, University of California, Santa Barbara, CA, 93106, USA.
James K FeathersLuminescence Dating Laboratory, University of Washington, 125 Raitt Hall, Seattle, WA, 98195-3412, USA.

Funding

Aucilla Research Institute, Inc 18.h.sc.300.041; DHR SC-721
6 · The paper itself

Abstract

Anomalous peak abundances of platinum and Fe-rich microspherules with high-temperature minerals have previously been demonstrated to be a chronostratigraphic marker for the lower Younger Dryas Boundary (YDB) dating to 12.8 ka. This study used Bayesian analyses to test this hypothesis in multiple sequences (units) of sandy, weakly stratified sediments at Wakulla Springs, Florida. Our investigations included platinum geochemistry, granulometry, optically stimulated luminescence (OSL) dating, and culturally dated lithics. In addition, sediments were analyzed using scanning electron microscopy and energy dispersive x-ray spectroscopy to investigate dendritic, iron-rich microspherules previously identified elsewhere in peak abundances at the onset of the Younger Dryas (YD) cool climatic episode. Our work has revealed this abundance peak in platinum and dendritic spherules in five sediment sequences at Wakulla Springs. A YDB age of ~ 12.8 ka for the platinum and spherule chronostratigraphic datum in these Wakulla Springs sequences is consistent with the archaeological data and OSL dating. This study confirms the utility of this YDB datum layer for intersequence correlation and for assessing relative ages of Paleoamerican artifacts, including those of likely Clovis, pre-Clovis, and post-Clovis age and their possible responses to environmental changes known to have occurred during the Younger Dryas cool climatic episode.

Identifiers

PMID38123649
PMCPMC10733423

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