New Petrographical Data on the Shiant Isles Picrite

H. I. Drever and R. Johnston
Department of Geology, University of St. Andrews

Summary: A recent bore-hole through the Shiant Isles picrite established the existence of 45 feet more of the picritic facies, and also the lower margin of the silt, at a point almost vertically below the exposed 35 feet previously investigated. In the light of new field and laboratory information the pieritic facies is briefly re-examined and its origin discussed.

Mineralogical Magazine; 1965 v. 34; no. 268; p. 194-203; DOI: 10.1180/minmag.1965.034.268.15
© 1965, The Mineralogical Society
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