Impact ejecta layer from the mid-Devonian: Possible connection to global mass extinctions

Science

Volumn 300, Issue 5626, 2003, Pages 1734-1737

  Ellwood, Brooks B ^a   Benoist, Stephen L ^a   El Hassani, Ahmed ^b   Wheeler, Christopher ^a   Crick, Rex E ^c  

^a LOUISIANA STATE UNIVERSITY   (United States)

^b Institut Scientifique   (Morocco)

^c UNIVERSITY OF TEXAS AT ARLINGTON   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CARBON; CRYSTALS; ISOTOPES; QUARTZ;

ISOTOPE SHIFT;

EARTH (PLANET);

ARSENIC; CARBON; CHROMIUM; COBALT; NICKEL; SILICON DIOXIDE; VANADIUM;

BOLIDE; DEVONIAN; EJECTA; IMPACT; MASS EXTINCTION;

ARTICLE; ASTRONOMY; DESERT; DEVONIAN; GLOBAL CHANGE; MARINE ENVIRONMENT; MOROCCO; PRIORITY JOURNAL; SPECIES EXTINCTION;

ANIMALS; CLIMATE; ECOSYSTEM; GEOLOGIC SEDIMENTS; MAGNETICS; METEOROIDS; MOROCCO; SEAWATER; TIME;

MOROCCO;

ANIMALIA; ENTOVALVA;

EID: 0037841790     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1081544     Document Type: Article

References (24)

1. B. M. French, Lunar Planet. Inst. Contrib. No. 954 (1998).
2. Material and Methods are available as supporting material on Science Online.
3. B. B. Ellwood, W. D. MacDonald, C. Wheeler, S. L. Benoist, Earth Planet. Sci. Lett. 206, 529 (2003).
4. O. H. Walliser, P. Bultynck, K. Weddige, R. T. Becker, M. R. House, Episodes 18, 107 (1995).
5. R. E. Crick, B. B. Ellwood, A. El Hassani, R. Feist, J. Hladil, Episodes 20, 167 (1997)
6. J. Hladil, P. Pruner, D. Venhodova, T. Hladilova, O. Man, Coral Res. Bull. 7, 65 (2002).
7. A. Salvador, International Stratigraphic Guide (Geological Society of America, Boulder, CO, 1994).
8. B. B. Elwood, R. E. Crick, A. El Hassani, AAPG Bull. 83, 1119 (1999).
9. B. Kaufmann, J. Sediment. Res. 67, 945 (1997).
10. J. Wendt, Z. Belka, B. Kaufmann, R. Kostrewa, J. Hayer, J. Sediment. Res. 67, 424 (1997).
11. J. Smit, W. G. H. Z. ten Kate, Cretaceous Res. 3, 307 (1982).
12. J. Smit et al., Micropaleontology 29, 65 (1997).
13. R. A. F. Grieve, J. Alexopoulos, Can. J. Earth Sci. 25, 1530 (1988).
14. B. B. Ellwood, R. E. Crick, A. El Hassani, S. Benoist, R. Young, Geology 28, 1135 (2000).
15. J. G. Johnson, G. Klapper, C. A Sandberg, Geol. Soc. Am. Bull. 96, 567 (1985).
16. M. R. House, Nature 313, 17 (1985).
17. J. J. Sepkoski Jr., in Global Events and Event Stratigraphy, O. H. Walliser, Ed. (Springer-Verlag, Berlin, 1996), pp. 35-51.
18. J. A. Talent, R. Maulson, A. S. Andrew, J. Hamilton, D. J. Whitford, Palaeogeogr. Palaeoclimatol. Palaeoecol. 104, 139 (1993).
19. K. J. Hsü et al., Nature 316, 809 (1985).
20. G. R. Dickens, J. R. O'Neill, D. K. Rea, R. M. Owen, Paleoceanography 10, 965 (1995).
21. L. R. Kump, Geology 19, 299 (1991).
22. K. A. Kvenvolden, Rev. Geophys. 31, 173 (1993).
23. H. Irwin, C. Curtis, M. Coleman, Nature 269, 209 (1977).
24. Funding was provided by grants from NSF and the American Chemical Society, and the Petroleum Research Fund to B.B.E. and R.E.C. We thank G. Byerly for his help with description of microspherules and microcryst grains and with the microprobe interpretations, we thank R. Ferrell for attempting x-ray diffraction analysis of microspherules; we thank both for critical review of the manuscript.