[meteorite-list] Precambrian impact ejecta blanket found in Scotland

[Paul]

Amor, K., Stephen P.Hesselbo, Don Porcelli, Scott Thackrey, and 
John Parnell, 2008, A Precambrian proximal ejecta blanket from 
Scotland. Geology..vol. 36, no. 4, pp. 303-306.
 
In part theabstract reads:
 
“The StacFada Member of the Precambrian Stoer Group in Scotland 
haspreviously been described as volcanic in origin. However, 
shockedquartz and biotite provide evidence for high-pressure shock
 metamorphism, while chromium isotopevalues and elevated 
abundancesof platinum group metals and siderophile elements 
indicateaddition of meteoritic material. Thus, the unit is 
reinterpretedhere as having an impact origin.”
 
This unit isas much as 20 meters thick in places.
 
http://www.gsajournals.org/perlserv/?request=get-abstract&doi=10.1130%2FG24454A.1


Related paper:


Young, G. M., 2002,  Stratigraphy and geochemistry of volcanic 
mass flows in the Stac Fada Member of the Stoer Group, 
Torridonian, NW Scotland. Royal Society of Edinburgh Transactions: 
Earth Sciences. vol.  93, no. 1, pp. 1-16.




 
Yours,
 
Paul H.
 





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