|Location is approximate, estimate based on other nearby localities.|
|Latitude & Longitude (WGS84):||44° North , 70° West (est.)|
|Margin of Error:||~4km|
|Köppen climate type:||Dfb : Warm-summer humid continental climate|
Oxford pegmatite field. Many granite pegmatites are located in Rumford and some were operated for sheet or scrap mica, while others were operated for feldspar. There are also a number of beryl prospects.
About 1910, high-quality chrysoberyl crystals were found at Ragged Ass Jack Mountain Locality in Hartford, Maine. The collectors who wanted to keep the locality a secret said that the chrysoberyl came from "Black Mountain" in the adjoining town of Peru. Because Black Mountain in Rumford is a very famous mineral locality, several specimens from the so-called Black Mountain locality in Peru have been erroneously relabeled Rumford, instead of Hartford. Chrysoberyl has not been formally reported from anywhere in Rumford.
The village of Rumford was informally known as Rumford Falls, because of its prominent water falls on the Androscoggin River. Jackson (1838, p. 97-99) discovered beds of limestone and wrote: "On a point just below the great falls, there is a bed of granular limestone... This bed is of a coarse granular or crystaline [sic] variety of carbonate of lime, containing scattered green crystals of actynolite snd pargasite, in small grains and fibres. ... A variety of crystallized silicates of various kinds, are found in the poorer limestone beds; and observing their resemblance to similar productions of the Phipsburg [sic] limestone, I searched and found a number of those rare minerals which I had formerly discovered at the latter locality. Yellow garnet, massive and crystallized - egeran - pyroxene, of several species and varieties - such as sahlite, augite and pargasite. Phosphate of lime, of the variety called asparagus stone, &c. occur, with a few scattered crystals of scapolite." Jackson continued with a report on the usefulness of the limestone to make lime and how much might be quarried. Many local mineral collectors probably visited the area to collect minerals, but those who searched during the 20th century all reported disappointment. It is unknown if the limestone was used to make lime. However, with the rapid development of Rumford into a paper manufacturing town in the early 1890s, the limestone beds remaining could have been submerged by the small dams used to raise river water levels to channel the log drive wood into the paper mill. The only important "point" is now occupied by a small city park.
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded from this region.
Mineral ListMineral list contains entries from the region specified including sub-localities
83 valid minerals. 1 (TL) - type locality of valid minerals. 2 erroneous literature entries.
Localities in this RegionShow map
- Oxford Co.
- Bean Mountain "Gold" mine
- Belleveau prospect
- Black Mountain Quarry (Black Mountain pegmatite)
- Brown Thurston prospect
- Carver prospect
- Frank Perham prospect
- George Elliot Quarry (North Rumford Mica Quarry)
- Goddard Ledge Quarry (Ford Hill Quarry; Roy Ledge Quarry; Silver Ledge Quarry)
- Howe Hill locality
- Howe Hill Nickel mine
- John Ladd Quarry
- Leach prospect
- Oxford Co.
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Jackson, Charles Thomas (1838) Second Report on the Geology of Maine, Luther Severence, Augusta, pp. 168., Charles Thomas (1838) Second Report on the Geology of Maine, Luther Severence, Augusta, pp. 168.