Coesite and shocked quartz discovered in the, Australasian and North American, microtektite layers

Research Article| May 01, 1993 Coesite and shocked quartz discovered in the, Australasian and North American, microtektite layers B. P. Glass; B. P. Glass 1Department of Geology, University of Delaware, Newark, Delaware 19716 Search for other works by this author on: GSW Google Scholar Jiquan Wu Jiquan Wu 1Department of Geology, University of Delaware, Newark, Delaware 19716 Search for other works by this author on: GSW Google Scholar Author and Article Information B. P. Glass 1Department of Geology, University of Delaware, Newark, Delaware 19716 Jiquan Wu 1Department of Geology, University of Delaware, Newark, Delaware 19716 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1993) 21 (5): 435–438. https://doi.org/10.1130/0091-7613(1993)021<0435:CASQDI>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 B. P. Glass, Jiquan Wu; Coesite and shocked quartz discovered in the, Australasian and North American, microtektite layers. Geology 1993;; 21 (5): 435–438. doi: https://doi.org/10.1130/0091-7613(1993)021<0435:CASQDI>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 Samples from the North American, Australasian, and Ivory Coast microtektite layers were examined for unmelted impact ejecta (>125 οm size). Coesite and shocked quartz, identified by X-ray diffraction, were found at all the sites where a well-defined North American microtektite layer had previously been documented. Coesite and shocked quartz were also foundin seven out of 33 cores from the Australasian strewn field; however, no coesite or shocked quartz was found associated with the Ivory Coast microtektite layer. Stishovite was also found at three of the Australasian sites. All of the Australasian cores containing coesite and shocked quartz were taken from within 2000 km of Indochina, which is believed by most to be the source area for the Australasian tektites and microtektites. Six of the seven cores have the highest concentrations of microtektites ever determined for Australasian microtektite- bearing cores. The seventh core did not contain any microtektites, which may be consistent with the hypothesis that the microtektites were deposited in a raylike pattern. The discovery of coesite and impact ejecta associated with both the North American and Australasian microtektite layers provides further support for the hypothesis of terrestrial impact origin of tektites. 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.