Thrust Fault Scarps Research Articles

Thrust Fault Scarp in the Western Australian Shield

The Meckering earthquake (October 14, 1968) produced an unusually definite thrust fault scarp.

ORDOVICIAN SHALES AND SUBMARINE SLIDE BRECCIAS OF NORTHERN CHAMPLAIN VALLEY IN VERMONT

Research Article| January 01, 1957 ORDOVICIAN SHALES AND SUBMARINE SLIDE BRECCIAS OF NORTHERN CHAMPLAIN VALLEY IN VERMONT DAVID HAWLEY DAVID HAWLEY HAMILTON COLLEGE, CLINTON, N. Y. Search for other works by this author on: GSW Google Scholar GSA Bulletin (1957) 68 (1): 55–94. https://doi.org/10.1130/0016-7606(1957)68[55:OSASSB]2.0.CO;2 Article history received: 01 Jul 1954 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 DAVID HAWLEY; ORDOVICIAN SHALES AND SUBMARINE SLIDE BRECCIAS OF NORTHERN CHAMPLAIN VALLEY IN VERMONT. GSA Bulletin 1957;; 68 (1): 55–94. doi: https://doi.org/10.1130/0016-7606(1957)68[55:OSASSB]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 fossiliferous, relatively pure Isle la Motte formation and Larrabee and Shoreham members of the Glen Falls formation (lower Trentonian) indicate deposition in shallow, comparatively clear seas. Upward through overlying Cumberland Head and Stony Point formations there is an increasing proportion of argillaceous limestone and calcareous shale. Small-scale current bedding in the Stony Point formation indicates currents from southwest. Next younger Iberville formation (upper Trentonian), 1000 to 2000 feet of rhythmically interbedded clay shale and graded dolomitic siltstone, contains occasional 5- to 10-inch coarser-graded beds with shale fragments, intrastratal crumpling, flow (load) cast, and slump structures. A deeper, muddier bottom subject to repeated turbidity currents is inferred. Uniformly oriented, small-scale current bedding indicates a northeastern source. Lying on Iberville is the Hathaway formation (new name), composed of argillite and bedded radiolarian chert with blocky inclusions (up to 50 feet long) of limestone, dolomite, dolomitic quartz siltstone, sandstone, coarse graywacke, and chert. It is chaotically deformed with extensive flowage and isoclinal folding perpendicular to regional trends, unrelated to tectonic structure of older formations in the area or to its own cleavage. Submarine slides are inferred, possibly from a thrust fault scarp to the east or northeast.This sequence of rocks is complexly folded and sheared, with greater intensity near the major “Logan's Line” thrusts bounding the area on the east. 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.