Meganos group, a newly recognized division in the Eocene of California

Abstract

Research Article| January 01, 1918 Meganos group, a newly recognized division in the Eocene of California BRUCE L. CLARK BRUCE L. CLARK Search for other works by this author on: GSW Google Scholar GSA Bulletin (1918) 29 (1): 281–296. https://doi.org/10.1130/GSAB-29-281 Article history received: 05 Mar 1918 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation BRUCE L. CLARK; Meganos group, a newly recognized division in the Eocene of California. GSA Bulletin 1918;; 29 (1): 281–296. doi: https://doi.org/10.1130/GSAB-29-281 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 Introductory StatementDuring the summer of 1917, while studying the Tertiary formations on the north side of Mount Diablo, in the Mount Diablo quadrangle, the writer noticed a marked difference in strike between certain of the beds which up to this time had been considered a part of the Tejon (Upper Eocene). This discordance, a difference of nearly 50 degrees, meant one of two things: either it was due to faulting or to an unconformity. Later detailed work has shown conclusively that here we have an unconformity, which was the result of crustal movements of considerable magnitude.Briefly stated, it is the writer’s conclusion, after studying the unconformity mentioned above, together with fairly large collections of fossil invertebrates from both above and below the line of contact, that we have here the evidence of a structural break of more than local importance; that the fauna found above the unconformity in beds associated . . . 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.