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Glen Riddle, Middletown Township, Delaware Co., Pennsylvania, USA

Latitude: 39°53'47"N
Longitude: 75°26'15"W

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Harmotome, as small, crusiform twins, was found in fractures in a gabbro dike intruding serpentine (Meier, 1939). The outcrop is in a railroad cut about 300 feet south of the Rt 452 overpass.

MEIER (A. E.). Association of harmotome and barium feldspar at Glen Riddle, Pennsylvania.
Amer. Min., 1939, vol. 24, pp. 540-560.

Mineral List

4 entries listed. 3 valid minerals.

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Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: 2nd May 2012 19:14:48