Franconia Formation of Minnesota and Wisconsin

Research Article| September 01, 1954 FRANCONIA FORMATION OF MINNESOTA AND WISCONSIN ROBERT R BERG ROBERT R BERG THE CALIFORNIA COMPANY, P. O. BOX 1769, CASPER, WYOMING Search for other works by this author on: GSW Google Scholar Author and Article Information ROBERT R BERG THE CALIFORNIA COMPANY, P. O. BOX 1769, CASPER, WYOMING Publisher: Geological Society of America Received: 06 Apr 1953 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1954, 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 (1954) 65 (9): 857–882. https://doi.org/10.1130/0016-7606(1954)65[857:FFOMAW]2.0.CO;2 Article history Received: 06 Apr 1953 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation ROBERT R BERG; FRANCONIA FORMATION OF MINNESOTA AND WISCONSIN. GSA Bulletin 1954;; 65 (9): 857–882. doi: https://doi.org/10.1130/0016-7606(1954)65[857:FFOMAW]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 The Upper Cambrian Franconia formation in southeast Minnesota and west-central Wisconsin consists of glauconitic, quartzose sandstones that average 175 feet in thickness. Previous subdivision of the Franconia resulted in faunal zones to which geographic member names were given. These zones are not rock units and cannot properly be called members.In this paper, members are based on rock type. They are, in ascending order, the Woodhill member—medium- to coarse-grained sandstone; the Birkmose member—fine-grained, glauconitic sandstone; the Tomah member—sandstone and shale; and the Reno member—glauconitic sandstone. A fifth unit, the Mazomanie member—thin-bedded or cross-bedded sandstone, forms a nonglauconitic facies that interfingers with and replaces the Reno member. Faunal zones are independent of the lithic units.The Woodhill member was deposited in the transgressing Franconia sea. Birkmose greensands formed in shallow waters far from shore, while Tomah sand and shale and Mazomanie thin-bedded sand were deposited nearer shore. Later, Reno greensands formed offshore, Mazomanie thin-bedded sand was deposited shoreward, and cross-bedded Mazomanie sand accumulated nearest the strand line. 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.