[meteorite-list] Fossil Micrometeorites Suggest Cosmic Dust is Common the Geological Record

From: Paul <etchplain_at_meteoritecentral.com>
Date: Mon, 26 Mar 2018 19:48:03 -0500
Message-ID: <288519f3-6719-8a2d-624f-5ace63976b22_at_att.net>

Suttle, M.D. and Genge, M.J., 2017. Diagenetically altered fossil
micrometeorites suggest cosmic dust is common the geological
record. Earth and Planetary Science Letters, 476, pp.132-142.

"We report the discovery of fossil micrometeorites from Late
Cretaceous chalk." (Seaford Chalk Formation, United Kingdom)

"However, this study demonstrates that fossil, pseudomorphic
micrometeorites can be recognized and are likely common within
the geological record."

It also? appears that micrometeorites and cosmic spherules of
various ages are common in Antarctic surficial and glacial deposits.

Genge, M.J., Davies, B., Suttle, M.D., van Ginneken, M. and Tomkins,
A.G., 2017. The mineralogy and petrology of I-type cosmic spherules:
Implications for their sources, origins and identification in sedimentary
 ?rocks. Geochimica et Cosmochimica Acta, 218, pp. 167-200.

Van Ginneken, M., Genge, M.J., Folco, L. and Harvey, R.P., 2016.
The weathering of micrometeorites from the Transantarctic
Mountains. Geochimica et Cosmochimica Acta, 179, pp. 1-31.

Although off-topic, the below is an interesting paper that is
currently open access.

T. C. Chamberlin, "Studies for Students:
The Method of Multiple Working Hypotheses,"
The Journal of Geology 5, no. 8
(Nov. - Dec., 1897): 837-848.


Paul H.

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Received on Mon 26 Mar 2018 08:48:03 PM PDT

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