You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Selenium in Soils and Vegetation Associated with Rocks of Permian and Triassic Age
O. A. Beath, C. S. Gilbert and H. F. Eppson
American Journal of Botany
Vol. 24, No. 2 (Feb., 1937), pp. 96-101
Published by: Botanical Society of America, Inc.
Stable URL: http://www.jstor.org/stable/2436728
Page Count: 6
You can always find the topics here!Topics: Selenium, Phosphates, Shales, Rocks, Plants, Vegetation, Canyons, Sandstones, Geology, Tunnels
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
The occurrence of selenium in the basal Chugwater and equivalent rocks has been traced from the southeastern part of Wyoming to the western border. In the several facies geologically designated as "The Little Medicine tongue of the Dinwoody," the "Embar," the Dinwoody, and the Phosphoria, and the Woodside and the Phosphoria, selenium has been found to occur in rocks and shales of each unit, with the possible exception of the Woodside. In three areas certain seleniferous native range plants were found in profuse abundance. In the fourth area in the Phosphoria of western Wyoming selenium was found to occur in a "spotty" condition in the phosphate rock. The lighter-colored, high-grade rock from Crawford Mountain and the Beckwith Hills was practically non-seleniferous, yielding only one part per million selenium or less. From the data obtained, it is evident that selenium is definitely a primary constituent of stratigraphically equivalent rocks of Permian and Triassic age. With the possible exception of the Woodside formation, selenium occurs in rock successions which are believed to be stratigraphical equivalents by leading authorities.
American Journal of Botany © 1937 Botanical Society of America, Inc.