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The terminal Eocene event - Formation of a ring system around the earthIt is suggested that the formation of a ring system about the earth by particles and debris related to the North American strewn tektite field is responsible for the terminal Eocene event of 34 million years ago, in which severe climatic changes accompanied by widespread biological extinctions occurred. Botanical data is cited which implies a 20-C decrease in winter temperature with no change in summer temperature, and evidence of the correlation of the North American tektite fall, which is estimated to have a total mass of 10 to the 9th to 10 to the 10th tons, with the disappearance of five of the most abundant species of radiolaria is presented. The possible connection between the tektites and climatic change is argued to result from the screening of sunlight by an equatorial ring of trapped particles of extraterrestrial origin in geocentric orbit which would cut off sunlight only in the winter months. Such a ring, located at a distance of between 1.5 and 2.5 earth radii (the Roche limit) is estimated to have a lifetime of a few million years.
Document ID
19800052479
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Okeefe, J. A.
(NASA Goddard Space Flight Center Laboratory for Astronomy and Solar Physics, Greenbelt, Md., United States)
Date Acquired
August 10, 2013
Publication Date
May 29, 1980
Publication Information
Publication: Nature
Volume: 285
Subject Category
Geosciences (General)
Accession Number
80A36649
Distribution Limits
Public
Copyright
Other

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