Microscopic lamellar deformation features in quartz: Discriminative characteristics of shock-generated varieties

Research Article| September 01, 1988 Microscopic lamellar deformation features in quartz: Discriminative characteristics of shock-generated varieties J. S. Alexopoulos; J. S. Alexopoulos 1Geophysics Division, Geological Survey of Canada, 1 Observatory Crescent, Ottawa K1A 0Y3, Canada Search for other works by this author on: GSW Google Scholar R. A. F. Grieve; R. A. F. Grieve 1Geophysics Division, Geological Survey of Canada, 1 Observatory Crescent, Ottawa K1A 0Y3, Canada Search for other works by this author on: GSW Google Scholar P. B. Robertson P. B. Robertson 1Geophysics Division, Geological Survey of Canada, 1 Observatory Crescent, Ottawa K1A 0Y3, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information J. S. Alexopoulos 1Geophysics Division, Geological Survey of Canada, 1 Observatory Crescent, Ottawa K1A 0Y3, Canada R. A. F. Grieve 1Geophysics Division, Geological Survey of Canada, 1 Observatory Crescent, Ottawa K1A 0Y3, Canada P. B. Robertson 1Geophysics Division, Geological Survey of Canada, 1 Observatory Crescent, Ottawa K1A 0Y3, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1988) 16 (9): 796–799. https://doi.org/10.1130/0091-7613(1988)016<0796:MLDFIQ>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation J. S. Alexopoulos, R. A. F. Grieve, P. B. Robertson; Microscopic lamellar deformation features in quartz: Discriminative characteristics of shock-generated varieties. Geology 1988;; 16 (9): 796–799. doi: https://doi.org/10.1130/0091-7613(1988)016<0796:MLDFIQ>2.3.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 SocietyGeology Search Advanced Search Abstract The appearance and orientation of microscopic lamellar deformation features in quartz have been examined in samples from different geologic environments. Lamellar deformation features from known shock and/or impact environments are sharp, parallel, closely spaced, and tend to extend in a continuous manner across entire grains. They have specific, well-documented orientations and occur in multiple sets per grain. Lamellar deformation features from other geologic environments, including tectonic and explosive volcanic, only superficially resemble shock features. They are generally less well defined, slightly curved, wider spaced, and tend to extend in a discontinuous manner across parts of grains. They have relatively random orientations, only some of which correspond to known shock orientations, and generally occur as single sets per grain. On the basis of these observations, we conclude that there is a characteristic set of microscopic deformation features produced in quartz by shock. These so-called planar features differ from microscopic lamellar deformation features produced by other dynamic processes; therefore, the case for the formation of characteristic planar features in quartz by natural processes other than impact is still not proven. 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.