By Virgil L. Sharpton, Peter D. Ward
An interdisciplinary convention on affects, volcanism, and mass morality.
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Extra resources for Global Catastrophes in Earth History: An Interdisciplinary Conference on Impacts, Volcanism, and Mass Mortality
Specifically, they proposed that the shock wave produced by an impact induces a transforma- 22 Loper and McCartney further suggested that impacts might trigger plate tectonic episodes. Rampino and Stothers ( 1 988) and Alt and others ( 1 988) cited the Deccan Traps as the location of a possible impact about 65 Ma that caused the extinction event and also initiated the persistent volcanism that continues at Reunion Island. This is an appealing scenario, especially because the location of the pur ported impact crater at K/T time has not been identified.
And Olson, P. , 1 989, The proximity of hotspots to convergent and divergent plate boundaries: Geophysical Research Letters, v. 1 6, p. 433-436. , 1 989, Magmatism at rift zones; The generation of volcanic continental margins and flood basalts: Journal of Geophysical Re search, v. 94, p. 7685-7729. Wilhelms, D. S. Geological Survey Professional Paper 1 348, 327 p. Won, I. , and Kuo, J. , 1 973, Oscillation of the Earth's inner core and its relation to the generation of geomagnetic field: Journal of Geophysical Re search, v.
Y. each, comparable to stratigraphic stages. Let e i , ez, eJ, . . en be the magnitudes of a sequence of extinc tion events of the type produced by the Monte Carlo simulations, where e varies from 0 (no kill) to 1 (complete kill). If a time interval starts with a cohort of genera, the portion of those genera killed during the time interval is: n cumulative kill = I - IT( I i=l - e;), (2) where n is the number of events in the interval. y. "stage" contains 750 I 0,000-yr events (n = 750), and the cumulative kill in each interval can be calculated from equation 2 to produce an extinction pattern that can be compared with the real record from paleontology.