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Document Type

Research

Abstract

This paper is a discussion of W. J. Thomsen's prize-winning paper presented to the Geology Section of the Iowa Academy of Science in 1952 and entitled "The Annual Contribution of Meteoritic Dust to the Mass of the Earth" (1). The present paper presents evidence that Thomsen's unusually high estimate for the annual deposition of meteoritic dust may be due to the presence of fly-ash in the magnetic dust samples he collected.

Publication Date

1953

Journal Title

Proceedings of the Iowa Academy of Science

Volume

60

Issue

1

First Page

373

Last Page

379

Copyright

© Copyright 1953 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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