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Title: Lower Jurassic unconformity (J-O) from the Colorado Plateau to the eastern Mojave Desert: evidence of a major tectonic event at the close of the Triassic

Abstract

From southern Nevada to the eastern Mojave Desert, the Lower Jurassic basal unconformity (J-0) cuts down section from the Upper Triassic Chinle Formation to deformed Paleozoic carbonate rocks. The Chinle Formation is not present southwest of the central Spring Mountians. Stratigraphic relations suggest correlation of J-0 with unconformities in western Arizona and the Inyo Mountains. Close proximity of J-0 in time and space to (1) first appearance of western-derived volcanic clasts in lower Mesozoic cratonal stratigraphy, (2) early Mesozoic thrust faults, and (3) the J-1 cusp in the apparent polar wander path imply a major change in tetonic setting of the southwestern Cordillera at the Triassic/Jurassic boundary.

Authors:
 [1]
  1. Southern Illinois Univ., Carbondale (USA)
Publication Date:
OSTI Identifier:
5524212
Resource Type:
Journal Article
Journal Name:
Geology; (USA)
Additional Journal Information:
Journal Volume: 19:4; Journal ID: ISSN 0091-7613
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; CALIFORNIA; GEOLOGIC FORMATIONS; TECTONICS; NEVADA; ARIZONA; CARBONATE ROCKS; COLORADO; CORRELATIONS; DEFORMATION; DESERTS; GEOLOGIC FAULTS; GEOLOGIC HISTORY; GEOLOGY; JURASSIC PERIOD; MESOZOIC ERA; STRATIGRAPHY; ARID LANDS; DEVELOPED COUNTRIES; FEDERAL REGION IX; FEDERAL REGION VIII; GEOLOGIC AGES; GEOLOGIC FRACTURES; GEOLOGIC STRUCTURES; NORTH AMERICA; ROCKS; SEDIMENTARY ROCKS; USA; 580000* - Geosciences

Citation Formats

Marzolf, J E. Lower Jurassic unconformity (J-O) from the Colorado Plateau to the eastern Mojave Desert: evidence of a major tectonic event at the close of the Triassic. United States: N. p., 1991. Web. doi:10.1130/0091-7613(1991)019<0320:LJUJFT>2.3.CO;2.
Marzolf, J E. Lower Jurassic unconformity (J-O) from the Colorado Plateau to the eastern Mojave Desert: evidence of a major tectonic event at the close of the Triassic. United States. https://doi.org/10.1130/0091-7613(1991)019<0320:LJUJFT>2.3.CO;2
Marzolf, J E. 1991. "Lower Jurassic unconformity (J-O) from the Colorado Plateau to the eastern Mojave Desert: evidence of a major tectonic event at the close of the Triassic". United States. https://doi.org/10.1130/0091-7613(1991)019<0320:LJUJFT>2.3.CO;2.
@article{osti_5524212,
title = {Lower Jurassic unconformity (J-O) from the Colorado Plateau to the eastern Mojave Desert: evidence of a major tectonic event at the close of the Triassic},
author = {Marzolf, J E},
abstractNote = {From southern Nevada to the eastern Mojave Desert, the Lower Jurassic basal unconformity (J-0) cuts down section from the Upper Triassic Chinle Formation to deformed Paleozoic carbonate rocks. The Chinle Formation is not present southwest of the central Spring Mountians. Stratigraphic relations suggest correlation of J-0 with unconformities in western Arizona and the Inyo Mountains. Close proximity of J-0 in time and space to (1) first appearance of western-derived volcanic clasts in lower Mesozoic cratonal stratigraphy, (2) early Mesozoic thrust faults, and (3) the J-1 cusp in the apparent polar wander path imply a major change in tetonic setting of the southwestern Cordillera at the Triassic/Jurassic boundary.},
doi = {10.1130/0091-7613(1991)019<0320:LJUJFT>2.3.CO;2},
url = {https://www.osti.gov/biblio/5524212}, journal = {Geology; (USA)},
issn = {0091-7613},
number = ,
volume = 19:4,
place = {United States},
year = {Mon Apr 01 00:00:00 EST 1991},
month = {Mon Apr 01 00:00:00 EST 1991}
}