Radiometric dating of ash partings in coal of the Eocene Puget Group, Washington; implications for paleobotanical stages

A time span of about 41.2 ± 1.8 to 45.0 ± 2.1 (2σ) m.y. for the 1,890-m section exposed in the Green River area. These age data do not entirely support the previous early Eocene through early Oligocene paleobotanical age estimates for this section.—Modified journal abstract.

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Bibliographic Details
Published in:Geology (Boulder) 1983-01, Vol.11 (9), p.527-531
Main Authors: Turner, Donald L, Frizzell, Virgil A, Triplehorn, Don M, Naeser, Charles W
Format: Article
Language:English
Subjects:
absolute age
apatite
biostratigraphy
Cenozoic
coal
correlation
dates
Eocene
fission-track dating
geochronology
Green River basin
K/Ar
King County Washington
organic residues
Paleogene
phosphates
Plantae
Puget Group
sections
sedimentary rocks
tephrochronology
Tertiary
United States
volcanic ash
Washington
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Description
Summary:A time span of about 41.2 ± 1.8 to 45.0 ± 2.1 (2σ) m.y. for the 1,890-m section exposed in the Green River area. These age data do not entirely support the previous early Eocene through early Oligocene paleobotanical age estimates for this section.—Modified journal abstract.
ISSN:0091-7613
1943-2682
DOI:10.1130/0091-7613(1983)11<527:RDOAPI>2.0.CO;2