Scottish National Dictionary (1700–)
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First published 1976 (SND Vol. X, list of scientific terms with Scottish connections).
This entry has not been updated since then but may contain minor corrections and revisions.
MARSCOITE. Geol. A hybrid rock of granite and gabbro (1904 Mem. Geol. Survey (Igneous Rocks Skye) 175, 186).
[Called after Marsco in Skye by A. Harker.]