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Chicxulub Multiring Impact Basin: Size and Other Characteristics Derived from Gravity Analysis

1993; American Association for the Advancement of Science; Volume: 261; Issue: 5128 Linguagem: Inglês

10.1126/science.261.5128.1564

1095-9203

V. L. Sharpton, Kevin Burke, Antonio Camargo‐Zanoguera, Stuart A. Hall, D. Scott Lee, Luis E. Marín, Gerardo Suáarez-Reynoso, Juan Manuel Quezada-Muñetón, P. D. Spudis, J. Urrutia‐Fucugauchi,

Geology and Paleoclimatology Research

The buried Chicxulub impact structure in Mexico, which is linked to the Cretaceous- Tertiary (K-T) boundary layer, may be significantly larger than previously suspected. Reprocessed gravity data over Northern Yucatan reveal three major rings and parts of a fourth ring, spaced similarly to those observed at multiring impact basins on other planets. The outer ring, probably corresponding to the basin's topographic rim, is almost 300 kilometers in diameter, indicating that Chicxulub may be one of the largest impact structures produced in the inner solar system since the period of early bombardment ended nearly 4 billion years ago.