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Aggregate Industries Quarry (Bayer-Mingolla Quarry; Trimount Quarry), Ashland, Middlesex Co., Massachusetts, USA
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Latitude: 42°14'3"N
Longitude: 71°28'37"W
 
 
A crushed stone quarry on Zachary Hill, opened in 1948 by Bayer and Mingolla Industries. Rocks in the quarry are primarily amphibolite, hornblende schist and quartz-biotite schist. (Cahoon, 1985)

Mineral List

Actinolite
Albite
var: Pericline
'Almandine-Spessartine Series'
Aurichalcite
Axinite-(Fe)
Babingtonite
'Biotite'
Bornite
Calcite
'Chabazite'
Chalcopyrite
Chamosite
Chrysocolla
Clinozoisite
Epidote
Ferro-hornblende
Fluorapatite
Goethite
Hematite
'Heulandite'
Ilmenite
Kamphaugite-(Y)
Laumontite
Magnetite
Malachite
Microcline
Montmorillonite
Muscovite
Natrolite
Opal
var: Opal-AN

Orthoclase
Pickeringite
Prehnite
Pyrite
'Pyroxene Group'
Pyrrhotite
Quartz
Sphalerite
Stellerite
'Stilbite'
Titanite
Tremolite


43 entries listed. 35 valid minerals.

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References

Biggart, Norman (1974). Ashland B & M Quarry. Souvenir Guide to New England Mineral Collecting (Annual Greater Boston Gem and Mineral Show program, pp. 41-43).

Cahoon, James C. (1985). Massachusetts: A Classic Swiss Alpine Cleft Mineral Region (Boston Mineralogical Symposium program book, May 1985)

M├ędard, Etienne; Cristofono, Peter; and Henderson, William A. (2007) Kamphaugite-(Y) from Ashland, MA (Micromounters of New England Newsletter 284:2-5)

External Links

http://rruff.info/uploads/MMNE284_2.pdf - "Kamphaugite-(Y) from Ashland, MA"

http://rruff.info/Kamphaugite-(Y) - Kamphaugite-(Y) R080085

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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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