[meteorite-list] Precambrian target rock mystery

From: jack satkoski <jackoski_at_meteoritecentral.com>
Date: Thu, 24 Oct 2013 10:49:23 -0700 (PDT)
Message-ID: <1382636963.73359.YahooMailNeo_at_web125802.mail.ne1.yahoo.com>

On the "Geologic Map of the silver city 7.5' Quadrangle west-central
Montana" are described "Target Rocks" in the Spokane Formation. On the
red bedding planes of the Spokane formation are areas of Concentric
bleaching around a central grain.? Central core red, then black, and
finally gray.? The circles sometimes come in constellations.? According to Dr Martin Bregman " the central nodule is high in strontium, rubidium, etc derived from the Grenville Highlands
to the east"

I am thinking an ET origin regarding these targets and throwing out idea for comments.? Another geologist suggested the reaction is a type of geo-chromotography but by what?

Phillis Hargrave et al lead author of the above paper with the Montana Bureau
of Mines and Geology has sent me additional photos to share.? The paper
should be online.

For now I am going to place my sample on unexposed film to see if there is a pattern.
Photos of first sample with cross section are from rock sample donated to me by Jim Whipple USGS retired.

Thanks to Mike Fiedler for helping me with photos from Google drive.



Jack Satkoski
Received on Thu 24 Oct 2013 01:49:23 PM PDT

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