Open AccessConfirmation of the Younger Dryas boundary (YDB) data at Murray Springs, AZ
Author(s) -
R. B. Firestone,
Allen West,
T. E. Bunch
Publication year - 2010
Publication title -
proceedings of the national academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.1003963107
Subject(s) - younger dryas , geology , geography , archaeology , holocene
We are pleased that Haynes et al. (1) have verified our discovery of a 12.9-ka peak in magnetic grains from the Clovis-age surface (YDB) at the Murray Springs site (2) that is even higher (8.2 g/kg) than we reported (2.6 g/kg), consistent with variable deposition. Haynes et al. (1) also reported much larger microspherule concentrations in the YDB, up to 37,000/kg, compared with 109/kg that we found in bulk sediment. Their elemental analysis of magnetic grains is similar to …
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