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Cosmic Ice Residuum associated with an Astrobleme?

Nature volume 213, pages 999–1000 (1967)Cite this article

Abstract

MANY circular to approximately polygonal structures on the Earth's surface have been described by geologists1 as astroblemes—the result of impact between the Earth and extraterrestrial bodies—although not all geologists2 accept this view of their origin. Some astroblemes have the form of craters and are associated with fragments of meteoritic iron. Others, more deeply dissected, are represented by a circular patch of sedimentary rock that originally filled the crater. Still others3, which include most astroblemes greater than 10 km in diameter, have a central uplift in which the strata are highly fractured and may be overturned. Surrounding this uplift is an annulus of impact breccia.

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Authors and Affiliations

  1. Department of Geology, Australian National University, Canberra

    KEITH A. W. CROOK

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  1. KEITH A. W. CROOK
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CROOK, K. Cosmic Ice Residuum associated with an Astrobleme?. Nature 213, 999–1000 (1967). https://doi.org/10.1038/213999a0

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