Sediment-Dispersed Extraterrestrial Chromite Traces a Major Asteroid Disruption Event-Reference-Cited by-同舟云学术

Sediment-Dispersed Extraterrestrial Chromite Traces a Major Asteroid Disruption Event

Published:2003-05-09 Issue:5621 Volume:300 Page:961-964
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Schmitz Birger¹²,Häggström Therese¹²,Tassinari Mario¹²

Affiliation:

1. Department of Earth Science, Rice University, Post Office Box 1892, Houston, TX 77251, USA.

2. Marine Geology, Earth Sciences Center, Box 460, SE-40530 Göteborg, Sweden.

Abstract

Abundant extraterrestrial chromite grains from decomposed meteorites occur in middle Ordovician (480 million years ago) marine limestone over an area of ∼250,000 square kilometers in southern Sweden. The chromite anomaly gives support for an increase of two orders of magnitude in the influx of meteorites to Earth during the mid-Ordovician, as previously indicated by fossil meteorites. Extraterrestrial chromite grains in mid-Ordovician limestone can be used to constrain in detail the temporal variations in flux of extraterrestrial matter after one of the largest asteroid disruption events in the asteroid belt in late solar-system history.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference25 articles.

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