Filters: Tags: Eocene (X) > Date Range: {"choice":"year"} (X)
9 results (59ms)|
Filters
Date Types (for Date Range)
Categories Tag Types
|
Eocene conglomerate resting unconformably on upturned edges of Marine Jurassic, Weber Canyon one mile above Croydon. The mountain on the right is composed of Triassic red beds. Utah. 1903.
West Spanish Peak, from the northwest. Flat-lying Eocene rocks outcrop on the middle slopes of the mountain. One large dike and several smaller ones are seen in the foreground. Las Animas County, Colorado. 1896. Figure 4 in U.S. Geological Survey Folio 71. 1901.
Eocene escarpment, T. 27 N., R. 113 W. Horizontal beds of sandstone, clay and shale of variegated colors. Viola quadrangle. Lincoln County, Wyoming. 1906.
Gros Ventre Mountain Range, viewed from the south on Hoback River, T. 38 N., R. 114 W. Eocene topography in foreground. Gros Ventre quadrangle. Lincoln County, Wyoming. 1906.
(Compare with Jackson image 029.)
This Data Release accompanies the planned publication, "Paleogene sedimentary basin development in southern Nevada, USA." Included here are U-Pb detrital zircon and Ar/Ar feldspar geochronologic data for middle Cenozoic sedimentary and volcanic rocks collected by Jens-Erik Lundstern and Theresa M. Schwartz in several parts of southern Nevada, U.S. The target strata are the lowest Cenozoic sedimentary rocks deposited above the base-Cenozoic unconformity. U-Pb detrital zircon data were obtained at the University of Arizona LaserChron Center in Tucson, Arizona in February 2021, October 2021, and January 2023. 40Ar/39Ar geochronologic data were collected at the U.S. Geological Survey in Denver, Colorado.
Categories: Data;
Tags: Cenozoic,
Central Nevada Desert Basins,
Desert National Wildlife Range,
Eocene,
Geochemistry,
Eocene conglomerate cliffs, near Echo. Utah. 1903.
Eocene escarpment, T. 27 N., R. 113 W. Showing peculiar weathering features and topography. Viola quadrangle. Lincoln County, Wyoming. 1906.
Uplift of Bear River beds overlapped by Eocene sandstone and conglomerates on Union Pacific one mile east of Spring Valley.
|
|
