Accretion Rates of Meteorites and Cosmic Dust in the Early Ordovician
- 3 October 1997
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 278 (5335), 88-90
- https://doi.org/10.1126/science.278.5335.88
Abstract
Abundant fossil meteorites in marine, condensed Lower Ordovician limestones from Kinnekulle, Sweden, indicate that accretion rates of meteorites were one to two orders of magnitude higher during an interval of the Early Ordovician than at present. Osmium isotope and iridium analyses of whole-rock limestone indicate a coeval enhancement of one order of magnitude in the influx rate of cosmic dust. Enhanced accretion of cosmic matter may be related to the disruption of the L chondrite parent body around 500 million years ago.Keywords
This publication has 17 references indexed in Scilit:
- Geochemistry of meteorite-rich marine limestone strata and fossil meteorites from the lower Ordovician at Kinnekulle, SwedenEarth and Planetary Science Letters, 1996
- Meteoritic, Asteroidal, and Theoretical Constraints on the 500 Ma Disruption of theLChondrite Parent BodyIcarus, 1996
- Diversification and Extinction in the History of LifeScience, 1995
- The marine187Os/186Os record of the past 80 million yearsEarth and Planetary Science Letters, 1995
- The Mbale meteorite showerMeteoritics, 1994
- Ordovician faunas, island arcs and ophiolites in the Scandinavian CaledonidesTerra Nova, 1992
- Discovery of a second Ordovician meteorite using chromite as a tracerNature, 1988
- Terrestrial Impact StructuresAnnual Review of Earth and Planetary Sciences, 1987
- The Ordovician chondrite from Brunflo, central Sweden, I. General description and primary mineralsLithos, 1984
- Vom Anfang, Hochstand und Ende eines EpikontinentalmeeresInternational Journal of Earth Sciences, 1971