Sandstone Dikes and Sills in the Moreno Shale, Panoche Hills, California

Research Article| November 01, 1971 Sandstone Dikes and Sills in the Moreno Shale, Panoche Hills, California NORMAN B SMYERS; NORMAN B SMYERS 15708 S. Van Ness Ave., No. 5, Gardena, California 90249 Search for other works by this author on: GSW Google Scholar GARY L PETERSON GARY L PETERSON Department of Geology, San Diego State College, San Diego, California 92115 Search for other works by this author on: GSW Google Scholar Author and Article Information NORMAN B SMYERS 15708 S. Van Ness Ave., No. 5, Gardena, California 90249 GARY L PETERSON Department of Geology, San Diego State College, San Diego, California 92115 Publisher: Geological Society of America Received: 07 Jun 1971 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1971, 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 (1971) 82 (11): 3201–3208. https://doi.org/10.1130/0016-7606(1971)82[3201:SDASIT]2.0.CO;2 Article history Received: 07 Jun 1971 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation NORMAN B SMYERS, GARY L PETERSON; Sandstone Dikes and Sills in the Moreno Shale, Panoche Hills, California. GSA Bulletin 1971;; 82 (11): 3201–3208. doi: https://doi.org/10.1130/0016-7606(1971)82[3201:SDASIT]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 Over 350 sandstone dikes and sills intrude the eastward-dipping Moreno Shale along the east flank of the Panoche Hills. The intrusions vary in width from several inches to 23 ft. Many crop out for several hundred yards and several extend continuously for 0.5 mi. The dikes and sills are composed of very well-sorted, fine-grained, poorly indurated sandstone.The intruding sand was derived primarily from thick unconsolidated sand beds in the lower part of the Moreno and was injected upward as a water-charged, low-viscosity slurry into three principal sets of fractures. The sills intruded shear planes produced by flexural-slip folding. Two sets of dikes fill a system of conjugate shear fractures. The intrusions appear to be very late in the structural history and possibly are post-Miocene in age. 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.