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Shocked Quartz in the Cretaceous-Tertiary Boundary Clays: Evidence for a Global Distribution
Abstract
Shocked quartz grains displaying planar features were isolated from Cretaceous- Tertiary boundary clays at five sites in Europe, a core from the north-central Pacific Ocean, and a site in New Zealand. At all of these sites, the planar features in the shocked quartz can be indexed to rational crystallographic planes of the quartz lattice. The grains display streaking indicative of shock in x-ray diffraction photographs and also show reduced refractive indices. These characteristic features of shocked quartz at several sites worldwide confirm that an impact event at the Cretaceous-Tertiary boundary distributed ejecta products in an earth-girdling dust cloud, as postulated by the Alvarez impact hypothesis.
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Citations
Cited by
Stöffler, D., Hamann, C., & Metzler, K. (2018) · Meteoritics & Planetary Science · doi:10.1111/maps.12912 · Cited by 466
Mapping Chicxulub crater structure with gravity and seismic reflection data
Hildebrand, A. R., Pilkington, M., Ortiz-Aleman, C., Chavez, R. E., Urrutia-Fucugauchi, J., Connors, M., Graniel-Castro, E., Camara-Zi, A., Halpenny, J. F., & Niehaus, D. (1998) · Geological Society, London, Special Publications · doi:10.1144/gsl.sp.1998.140.01.12 · Cited by 64
Vredefort: A model for the anatomy of an astrobleme
Brink, M. C., Waanders, F. B., & Bisschoff, A. A. (1997) · Tectonophysics · doi:10.1016/s0040-1951(96)00175-8 · Cited by 25
Metadata
- Authors
- Bohor, B. F., Modreski, P. J., & Foord, E. E.
- Venue
- Science
- Published
- 1987-05-08
- Volume
- 236
- Issue
- 4802
- Pages
- 705-709
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2054343501
- Cited by
- 180
- References
- 0
- FWCI
- 23.29
- Type
- journal article
- Language
- en
- Open access
- closed
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- Bohor, B. F., Modreski, P. J., & Foord, E. E. (1987). Shocked Quartz in the Cretaceous-Tertiary Boundary Clays: Evidence for a Global Distribution. Science. https://doi.org/10.1126/science.236.4802.705
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
