RECENT SEDIMENTS OF THREE WISCONSIN LAKES

Abstract

Research Article| July 01, 1956 RECENT SEDIMENTS OF THREE WISCONSIN LAKES RAYMOND C MURRAY RAYMOND C MURRAY SHELL OIL COMPANY, HOUSTON 1, TEXAS Search for other works by this author on: GSW Google Scholar Author and Article Information RAYMOND C MURRAY SHELL OIL COMPANY, HOUSTON 1, TEXAS Publisher: Geological Society of America Received: 22 Apr 1955 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1956, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1956) 67 (7): 883–910. https://doi.org/10.1130/0016-7606(1956)67[883:RSOTWL]2.0.CO;2 Article history Received: 22 Apr 1955 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation RAYMOND C MURRAY; RECENT SEDIMENTS OF THREE WISCONSIN LAKES. GSA Bulletin 1956;; 67 (7): 883–910. doi: https://doi.org/10.1130/0016-7606(1956)67[883:RSOTWL]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Sedimentation in Lake Mendota, a hard-water, eutrophic lake in southern Wisconsin, has changed abruptly in the recent past. This change is recorded in cores by a buff marl overlain by 1–14 inches of black sludge. The interface between the two sediments is very sharp. The marl and sludge differ in being high-carbonate low-clastics and low-carbonate high-clastics sediments, respectively, but their organic content is essentially the same. The change in sedimentation is ascribed to increased deposition of clastic material in the lake as a consequence of farm and domestic practice. Contemporaneous with this increased clastic deposition there has been an increase in the biologic productivity of the lake with its accompanying hypolimnia oxygen deficiency. The increase in productivity may also have resulted from domestic drainage. The black color of the sludge results from the presence of ferrous sulfides deposited under conditions of oxygen deficiency and not from organic content as previously supposed.The sediments of Trout Lake, a medium-soft-water, oligotrophic lake in northern Wisconsin, have high organic content and are dark green. Where complete sections of the sediments are available, the distribution of organic content shows increased organic deposition with the advance of time. The most recent sediments show a slight decrease in organic content which is ascribed to recent increased clastic deposition. Lake Wingra is a shallow, hard-water, advanced eutrophic lake, near Lake Mendota. Its recent bottom deposits consist of a gray marl, which in shallow water becomes shell marl.No evidence was found to support the theory that important diagentic changes are taking place in any of the sediments studied. Changes in the sediments which have taken place after deposition, exclusive of compaction and water loss, appear to be restricted to the upper few inches of the most recent record. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.