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Rumford, Oxford Co., Maine, USA

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Rumford Falls, Rumford, Maine, USA

Rumford, Oxford Co., Maine, USA
The exposed pegmatite and prospect.

Lookout Quarry, Rumford, Oxford Co., Maine, USA
Rumford Falls, Rumford, Maine, USA

Rumford, Oxford Co., Maine, USA
The exposed pegmatite and prospect.

Lookout Quarry, Rumford, Oxford Co., Maine, USA
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 List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

Albite

var: Cleavelandite

var: Zygadite

Almandine

Amblygonite

Annite

Arsenopyrite

Autunite

Beraunite

Bertrandite

Beryl

var: Aquamarine

var: Goshenite

var: Heliodor

Beryllonite

'Biotite'

Calcite

Cassiterite

Chalcophanite

Chalcopyrite

Chamosite

'Chamosite-Clinochlore Series'

Childrenite

Columbite-(Fe)

'Columbite-(Fe)-Columbite-(Mn) Series'

Columbite-(Mn)

Cookeite

Cryptomelane

Diadochite

Dickinsonite-(KMnNa)

Diopside

Dravite

Elbaite

Eosphorite

Fairfieldite

'Feldspar Group'

'var: Perthite'

Fluorapatite

var: Carbonate-rich Fluorapatite

Goethite

Goyazite

Greifensteinite

Grossular

'Gummite'

Hematite

Heterosite

Hureaulite

Hurlbutite

Hydroxylapatite

var: Carbonate-rich Hydroxylapatite

Hydroxylherderite

'Indicolite'

Jahnsite-(CaMnFe)

'Jahnsite Group'

Kosnarite (TL)

Laueite

'Lepidolite'

'Limonite'

Löllingite

Ludlamite

Magnetite

'Manganese Oxides'

Meionite

Messelite

Meta-autunite

Metatorbernite

'Mica Group'

Microcline

Microlite Group

Mitridatite

Montebrasite

Montmorillonite

Muscovite

var: Damourite

var: Sericite

Nontronite

Opal

var: Opal-AN

Phosphophyllite

Phosphosiderite

Phosphuranylite

Pollucite

Purpurite

Pyrite

Pyrrhotite

Quartz

var: Milky Quartz

var: Rose Quartz

var: Smoky Quartz

Rhodochrosite

Rockbridgeite

Roscherite

Rossmanite

'Rubellite'

Schorl

Siderite

Sphalerite

Spodumene

Strunzite

'Strunzite Group'

Tantalite-(Mn)

Titanite

Todorokite

Torbernite

'Tourmaline'

Triphylite

'Turgite'

Uraninite

Uranophane

Väyrynenite

'Verdelite'

Vesuvianite

Vivianite

Wodginite

Zircon


83 valid minerals. 1 (TL) - type locality of valid minerals. 2 erroneous literature entries.

Localities in this Region
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This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.

 
Mineral and/or Locality  
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