Physics
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..423g&link_type=abstract
Lunar and Planetary Science, volume 27, page 423
Physics
Coesite, Ejecta: Impact, North American Strewn Field, Quartz: Shocked, Spherules: Clinopyroxene-Bearing, Tektites
Scientific paper
Previous studies have shown that an 8-cm-thick layer of impact ejecta (including tektites, shocked quartz, coesite, and stishovite) occurs at Deep Sea Drilling Project (DSDP) Site 612 on the Continental Slope off New Jersey. During Leg 150 of the Ocean Drilling Project (ODP) two additional sites, drilled within 9 km of Site 612, were found to contain late Eocene impact ejecta. Site 904A, 4.9 km north (up slope) of Site 612, was found to contain a layer of tektite glass and shocked quartz. In addition to tektite glass and shocked quartz at Site 904A, we report here the discovery of coesite and clinopyroxene-bearing spherules. Site 903C was drilled 7.5 km to the northwest of Site 904. A 7-cm-thick laminated layer was identified in core 56R, section 6, from Site 903C, which was described as a "... silty to very fine sandy interval ... that may contain microtektites". The sandy interval in core 56R, section 6, appears to be equivalent in age to the upper Eocene tektite layer found at Sites 612 and 904A. We report here the discovery of impact ejecta (but no tektite glass) at Site 903C.
Glass Billy P.
McHugh Cecilia M. G.
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