Earliest Jurassic U-Pb ages from carbonate deposits in the Navajo Sandstone, southeastern Utah, USA

Judith Totman Parrish; E. Troy Rasbury; Marjorie A. Chan; Stephen T. Hasiotis

doi:10.1130/G46338.1

Earliest Jurassic U-Pb ages from carbonate deposits in the Navajo Sandstone, southeastern Utah, USA

Judith Totman Parrish
, E. Troy Rasbury
, Marjorie A. Chan
, Stephen T. Hasiotis

Geosciences

Stony Brook University

University of Idaho
University of Utah
University of Kansas

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

New uranium-lead (U-Pb) analyses of carbonate deposits in the Navajo Sandstone in southeastern Utah (USA) yielded dates of 200.5 ± 1.5 Ma (earliest Jurassic, Hettangian Age) and 195.0 ± 7.7 Ma (Early Jurassic, Sinemurian Age). These radioisotopic ages-the first reported from the Navajo erg and the oldest ages reported for this formation-are critical for understanding Colorado Plateau stratigraphy because they demonstrate that initial Navajo Sandstone deposition began just after the Triassic and that the base of the unit is strongly time-transgressive by at least 5.5 m.y.

Original language	English
Pages (from-to)	1015-1019
Number of pages	5
Journal	Geology
Volume	47
Issue number	11
DOIs	https://doi.org/10.1130/G46338.1
State	Published - Nov 1 2019

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title = "Earliest Jurassic U-Pb ages from carbonate deposits in the Navajo Sandstone, southeastern Utah, USA",

abstract = "New uranium-lead (U-Pb) analyses of carbonate deposits in the Navajo Sandstone in southeastern Utah (USA) yielded dates of 200.5 ± 1.5 Ma (earliest Jurassic, Hettangian Age) and 195.0 ± 7.7 Ma (Early Jurassic, Sinemurian Age). These radioisotopic ages-the first reported from the Navajo erg and the oldest ages reported for this formation-are critical for understanding Colorado Plateau stratigraphy because they demonstrate that initial Navajo Sandstone deposition began just after the Triassic and that the base of the unit is strongly time-transgressive by at least 5.5 m.y.",

author = "Parrish, \{Judith Totman\} and Rasbury, \{E. Troy\} and Chan, \{Marjorie A.\} and Hasiotis, \{Stephen T.\}",

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doi = "10.1130/G46338.1",

language = "English",

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T1 - Earliest Jurassic U-Pb ages from carbonate deposits in the Navajo Sandstone, southeastern Utah, USA

AU - Parrish, Judith Totman

AU - Rasbury, E. Troy

AU - Chan, Marjorie A.

AU - Hasiotis, Stephen T.

PY - 2019/11/1

Y1 - 2019/11/1

N2 - New uranium-lead (U-Pb) analyses of carbonate deposits in the Navajo Sandstone in southeastern Utah (USA) yielded dates of 200.5 ± 1.5 Ma (earliest Jurassic, Hettangian Age) and 195.0 ± 7.7 Ma (Early Jurassic, Sinemurian Age). These radioisotopic ages-the first reported from the Navajo erg and the oldest ages reported for this formation-are critical for understanding Colorado Plateau stratigraphy because they demonstrate that initial Navajo Sandstone deposition began just after the Triassic and that the base of the unit is strongly time-transgressive by at least 5.5 m.y.

AB - New uranium-lead (U-Pb) analyses of carbonate deposits in the Navajo Sandstone in southeastern Utah (USA) yielded dates of 200.5 ± 1.5 Ma (earliest Jurassic, Hettangian Age) and 195.0 ± 7.7 Ma (Early Jurassic, Sinemurian Age). These radioisotopic ages-the first reported from the Navajo erg and the oldest ages reported for this formation-are critical for understanding Colorado Plateau stratigraphy because they demonstrate that initial Navajo Sandstone deposition began just after the Triassic and that the base of the unit is strongly time-transgressive by at least 5.5 m.y.

UR - https://www.scopus.com/pages/publications/85076763882

U2 - 10.1130/G46338.1

DO - 10.1130/G46338.1

M3 - Article

SN - 0091-7613

VL - 47

SP - 1015

EP - 1019

JO - Geology

JF - Geology

IS - 11

ER -

Earliest Jurassic U-Pb ages from carbonate deposits in the Navajo Sandstone, southeastern Utah, USA

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