Impacts on Earth in the Late Triassic

Details Impacts on Earth in the Late Triassic Impacts on Earth in the Late Triassic

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998natur.395..126k&link_type=abstract

Nature, Volume 395, Issue 6698, pp. 126 (1998).

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Scientific paper

Sprayet al. postulate that five widely dispersed terrestrial impact structures with very similar geological age estimates (about 214 million years ago, in the Late Triassic epoch) are evidence of a multiple impact event. Most notably, the three largest impact structures, Saint Martin in western Canada (~40 km diameter), Manicouagan in eastern Canada (~100 km diameter), and Rochechouart in France (~25 km diameter), plot at virtually the same palaeolatitude in a continental reconstruction. Spray et al. suggest that this apparent crater chain was produced within hours as a series of coaxial projectiles collided in rapid succession with the rotating planet Earth, and drew analogies to the recent collision sequence of fragmented comet Shoemaker-Levy 9 with Jupiter.

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