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Topsham, Sagadahoc Co., Maine, USA

Granite pegmatites. Brunswick pegmatite field. Large number of quarries and prospects that are permanently water-filled.
Ref.: Rocks & Min.: 62:407-415 (list on 409). Topsham is located about 25 miles NE of Portland, ME. The mineralization is a mile-wide belt of granitic pegmatites originally operated as feldspar quarries in a large district. Numerous world-famous radioactive mineral outcrops cover an area of several square kilometers from Standpipe Hill in the west near the Androscoggin River to the Cathance River in the east. The uraninite, monazite-(Ce), and ishakawaite minerals are particularly radioactive as they contain varying small amounts of thorium.

Mineral List

Mineral list contains entries from the region specified including sub-localities
Albite
var: Cleavelandite
var: Oligoclase
Allanite-(Ce)
Almandine
Anatase
Annite
Arsenopyrite
Autunite
Bertrandite
Beryl
var: Aquamarine
var: Emerald
var: Heliodor
var: Morganite
'Biotite'
Bismuthinite
Bismutite
Brochantite
Brookite
Chalcopyrite
Chrysoberyl
'Columbite'
Columbite-(Fe)
Columbite-(Mn)
Elbaite
Euclase
Fergusonite-(Y)
Fluorapatite
Foitite
Gahnite
Goethite
Grayite
Hematite
Hydroxylherderite
Ilmenite
Ishikawaite
Lepidolite
Magnetite
Meta-autunite
Metatorbernite
Microcline
Microlite Group
Molybdenite
Monazite-(Ce)
Muscovite
var: Schernikite
var: Sericite
Nontronite
Opal
var: Opal-AN

Orthoclase
Phenakite
Phosphuranylite
Polycrase-(Y)
Pyrite
Quartz
var: Rose Quartz
Quartz
var: Smoky Quartz

Rutile
Schoepite
Schorl
Stibiotantalite
Tantalite-(Mn)
'Tapiolite'
Tapiolite-(Fe)
Thorianite
Thorogummite
Topaz
Torbernite
'Tourmaline
var: Indicolite'

'var: Rubellite'
'var: Verdelite'
Uraninite
Uranophane
Xenotime-(Y)
Zircon


86 entries listed. 59 valid minerals.

Localities in this Region

USA
USA

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Copyright © Jolyon Ralph and Ida Chau 1993-2013. 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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