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Tupper Rock, Bandon, Coos Co., Oregon, USA
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Latitude: 43°7'6"N
Longitude: 124°25'42"W
An elevated sea stack that was leveled by quarrying and no longer exists, with the site covered by a retirement home. Late Jurassic blueschist was obtained there and used to construct the Coquille River Jetty in Bandon, where samples can be seen (but not collected). The blueschist was part of a tectonic mélange formed in subduction zone, and metamorphosed under high-pressure, low-temperature conditions.

Mineral List

'Actinolite-Tremolite Series'
'Feldspar Group'
Glaucophane Root Name

6 entries listed. 3 valid minerals.

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Alt, D., and Hyndman, D., 1978, Roadside Geology of Oregon: Missoula, Mountain Press. (See p. 97-98 for blueschist at Bandon jetty.)

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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands 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.
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