A quarry in the Antietam Formation (Cambrian), Vintage Dolomite (Cambrian) and Antietam Schist (Cambrian), intruded by diabase (Triassic).
References
Thomlinson, Harold W. (1942). Idiomorphic Cordierite From Safe Harbor, Pennsylvania.
American Mineralogist 27:646-648.
Chapman, R.W. (1950), "Contact-Metamorphic Effects of Triassic diabase at Safe Harbor (Lancaster Co.), PA," Geol. Soc. Am. Bull., Vol 61: 191-220.
Friends of Mineralogy Newsletter, Region 3 (Summer ed. 1975):2.
Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the Pennsylvania List 1965-1974, Min. Soc. of PA, Inc.: 15, 40-41.
Mineral List
16 entries listed. 12 valid minerals.
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