Coombs Feldspar Quarry

Producer in Sagadahoc county in Maine, United States with commodities Niobium (Columbium), Tantalum, Feldspar

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Commodities
Materials information
Host and associated rocks
Nearby scientific data
Economic information about the deposit and operations
Links to other databases
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10107755
MRDS ID	D001851
Record type	Site
Current site name	Coombs Feldspar Quarry

Geographic coordinates

Geographic coordinates:	-69.91611, 44.03326 (WGS84)
Location accuracy	10000(meters)

Site location context

Political divisions (FIPS codes)

Sagadahoc(county)

Maine(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Bowdoinham(quadrangle 1:24,000 scale)

Augusta(quadrangle 1:100,000 scale)

Bangor(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Androscoggin River(hydrologic unit)

Androscoggin(hydrologic accounting unit)

Androscoggin(hydrologic subregion)

New England(hydrologic region)

Geographic areas

Country	State	County
United States	Maine	Sagadahoc

Commodities

Commodity	Importance
Niobium (Columbium) Critical	Primary
Tantalum Critical	Primary
Feldspar	Primary

Materials information

Materials	Type of material
Beryl	Ore
Muscovite	Ore
Tantalite	Ore
Columbite	Ore

Host and associated rocks

Host or associated Host

Rock type Metamorphic Rock > Schist

Host or associated	Host
Rock type	Metamorphic Rock > Schist

Nearby scientific data

(1)	-69.91611, 44.03326	ListMap

Economic information

Economic information about the deposit and operations

Development status	Producer
Commodity type	Both
Significant	No

Comments on the workings information

Intermittent Producer

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	D001851

Bibliographic references

Deposit

CAMERON, E. N., AND OTHERS, 1954, PEGMATITE INVESTIGATIONS 1942 - 1945, NEW ENGLAND, U. S. G. S. PROF. PAPER 255
Deposit

Cameron, E. N., Larrabee, D. M., Mcnair, A. H., Page, J. J., Shainin, V. E., And Stewart, G. W., 1954, Pegmatite Investigations 1942-45, New England: U. S. Geological Survey Professional Paper 255, 352 P.Cameron, E. N., Larrabee, D. M., Mcnair, A. H., Page, J. J., Shainin, V. E., And Stewart, G. W., 1954, Pegmatite Investigations 1942-45, New England: U. S. Geological Survey Professional Paper 255, 352 P.

General comments

Subject category	Comment text
Deposit	PRODUCTION OF FELDSPAR, MICA, AND BERYL ONLY, MASSES OF COLUMBITE - TANTALITE UP TO 15 LBS. REPORTED AT CONTACT OF PERTHITE AND BIOTITE PEGMATITE ; INFO.SRC : 4 OTHER SRC
Deposit	Production of Feldspar, Mica, and Beryl Only, Masses of Columbite - Tantalite Up To 15 Lbs. Reported At Contact of Perthite and Biotite Pegmatite

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-OCT-1975	Parker, Raymond L.	U.S. Geological Survey
Editor	01-DEC-2002	Woodruff, Laurel G.	U.S. Geological Survey	Entered Ore Material Codes; Expanded References;

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.