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Yedlin Locality, Topsham, Sagadahoc County, Maine, USAi
Regional Level Types
Yedlin Locality- not defined -
TopshamTown
Sagadahoc CountyCounty
MaineState
USACountry

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Latitude & Longitude (WGS84):
43° 55' 18'' North , 69° 58' 44'' West
Latitude & Longitude (decimal):
43.92167,-69.97889
GeoHash:
G#: dry1zedym
GRN:
N30W37
Köppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Topsham5,931 (2017)0.7km
Brunswick15,175 (2017)1.3km
Brunswick Station578 (2017)5.4km
Lisbon Falls4,100 (2017)10.6km
Bowdoinham722 (2017)11.7km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Maine Mineralogical & Geological SocietyPortland, Maine37km
Kennebec Rocks and Minerals ClubWinthrop, Maine43km
Mindat Locality ID:
5950
Long-form identifier:
mindat:1:2:5950:6
GUID (UUID V4):
1606ff49-783e-4908-9362-039c8c83ae0e


Two shallow feldspar prospect pits. Brunswick pegmatite field. Granite Pegmatite. Very radioactive bedrock in the area.

Critical Areas Status:

The Yedlin Locality is a small prospect area recognized by Neal Yedlin as containing good crystals of what was then identified as "samarskite". The locality was described by him in Rocks and Minerals magazine. Because of the article, the locality became known as the Yedlin Prospect. Subsequently, the mineral of interest was re-identified as ishakawaite and it was then that the locality acquired international status for having specimens that are world class size and quality. The locality is an area that is inventoried by the USA Critical Mineral Areas program and designated as a Most Important Site needing protection from development. This habitat is also the only place in Maine where fergusonite-(Y) has been found. The largest xenotime-(Y) crystal from Maine is from this locality. The habitat consists of an area comprising about 1 hectare. The area is also noted as one where the bedrock contains naturally significantly radioactive minerals.

May 11, 2014; the area on the north side of the water filled trench (toward the large water tank and new road) has been cleared for development, but not the primary dump side of the trench (south side). Ishikawaite crystals were found in dumps on both sides of the trench, however.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


19 valid minerals.

Detailed Mineral List:

ⓘ Albite
Formula: Na(AlSi3O8)
ⓘ Allanite-(Ce)
Formula: (CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
ⓘ Almandine
Formula: Fe2+3Al2(SiO4)3
ⓘ Annite
Formula: KFe2+3(AlSi3O10)(OH)2
ⓘ Autunite
Formula: Ca(UO2)2(PO4)2 · 10-12H2O
ⓘ Beryl
Formula: Be3Al2(Si6O18)
ⓘ 'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
ⓘ Columbite-(Fe)
Formula: Fe2+Nb2O6
Habit: elongated, flattened prisms
Colour: black with iridescence
Description: Epitaxial micro-crystals in parallel growth on ishikawaite.
ⓘ Fergusonite-(Y)
Formula: YNbO4
ⓘ Hematite
Formula: Fe2O3
✪ Ishikawaite
Formula: U4+Fe2+Nb2O8
ⓘ Magnetite
Formula: Fe2+Fe3+2O4
ⓘ Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6H2O
ⓘ Microcline
Formula: K(AlSi3O8)
ⓘ Monazite-(Ce)
Formula: Ce(PO4)
ⓘ Muscovite
Formula: KAl2(AlSi3O10)(OH)2
ⓘ Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
ⓘ Opal
Formula: SiO2 · nH2O
ⓘ Opal var. Opal-AN
Formula: SiO2 · nH2O
ⓘ Quartz
Formula: SiO2
ⓘ Xenotime-(Y)
Formula: Y(PO4)

Gallery:

KFe2+3(AlSi3O10)(OH)2ⓘ Annite
Fe2+Nb2O6ⓘ Columbite-(Fe)
U4+Fe2+Nb2O8ⓘ Ishikawaite
Fe2+Fe3+2O4ⓘ Magnetite
Ce(PO4)ⓘ Monazite-(Ce)
Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2Oⓘ Nontronite
SiO2 · nH2Oⓘ Opal var. Opal-AN

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘMagnetite4.BB.05Fe2+Fe3+2O4
ⓘHematite4.CB.05Fe2O3
ⓘQuartz4.DA.05SiO2
ⓘOpal
var. Opal-AN		4.DA.10SiO2 · nH2O
ⓘ4.DA.10SiO2 · nH2O
ⓘIshikawaite4.DB.25U4+Fe2+Nb2O8
ⓘColumbite-(Fe)4.DB.35Fe2+Nb2O6
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘFergusonite-(Y)7.GA.05YNbO4
Group 8 - Phosphates, Arsenates and Vanadates
ⓘXenotime-(Y)8.AD.35Y(PO4)
ⓘMonazite-(Ce)8.AD.50Ce(PO4)
ⓘAutunite8.EB.05Ca(UO2)2(PO4)2 · 10-12H2O
ⓘMeta-autunite8.EB.10Ca(UO2)2(PO4)2 · 6H2O
Group 9 - Silicates
ⓘAlmandine9.AD.25Fe2+3Al2(SiO4)3
ⓘAllanite-(Ce)9.BG.05b(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
ⓘBeryl9.CJ.05Be3Al2(Si6O18)
ⓘMuscovite9.EC.15KAl2(AlSi3O10)(OH)2
ⓘAnnite9.EC.20KFe2+3(AlSi3O10)(OH)2
ⓘNontronite9.EC.40Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
ⓘMicrocline9.FA.30K(AlSi3O8)
ⓘAlbite9.FA.35Na(AlSi3O8)
Unclassified
ⓘ'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2

List of minerals for each chemical element

HHydrogen
Hⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Hⓘ AnniteKFe32+(AlSi3O10)(OH)2
Hⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Hⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Hⓘ Opal var. Opal-ANSiO2 · nH2O
Hⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Hⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Hⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Hⓘ OpalSiO2 · nH2O
BeBeryllium
Beⓘ BerylBe3Al2(Si6O18)
OOxygen
Oⓘ AlbiteNa(AlSi3O8)
Oⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Oⓘ AnniteKFe32+(AlSi3O10)(OH)2
Oⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Oⓘ AlmandineFe32+Al2(SiO4)3
Oⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Oⓘ BerylBe3Al2(Si6O18)
Oⓘ Fergusonite-(Y)YNbO4
Oⓘ Columbite-(Fe)Fe2+Nb2O6
Oⓘ HematiteFe2O3
Oⓘ Opal var. Opal-ANSiO2 · nH2O
Oⓘ IshikawaiteU4+Fe2+Nb2O8
Oⓘ MagnetiteFe2+Fe23+O4
Oⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Oⓘ MicroclineK(AlSi3O8)
Oⓘ Monazite-(Ce)Ce(PO4)
Oⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Oⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Oⓘ OpalSiO2 · nH2O
Oⓘ QuartzSiO2
Oⓘ Xenotime-(Y)Y(PO4)
FFluorine
Fⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
NaSodium
Naⓘ AlbiteNa(AlSi3O8)
Naⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
MgMagnesium
Mgⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
AlAluminium
Alⓘ AlbiteNa(AlSi3O8)
Alⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Alⓘ AnniteKFe32+(AlSi3O10)(OH)2
Alⓘ AlmandineFe32+Al2(SiO4)3
Alⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Alⓘ BerylBe3Al2(Si6O18)
Alⓘ MicroclineK(AlSi3O8)
Alⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Alⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
SiSilicon
Siⓘ AlbiteNa(AlSi3O8)
Siⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Siⓘ AnniteKFe32+(AlSi3O10)(OH)2
Siⓘ AlmandineFe32+Al2(SiO4)3
Siⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Siⓘ BerylBe3Al2(Si6O18)
Siⓘ Opal var. Opal-ANSiO2 · nH2O
Siⓘ MicroclineK(AlSi3O8)
Siⓘ MuscoviteKAl2(AlSi3O10)(OH)2
Siⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Siⓘ OpalSiO2 · nH2O
Siⓘ QuartzSiO2
PPhosphorus
Pⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Pⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
Pⓘ Monazite-(Ce)Ce(PO4)
Pⓘ Xenotime-(Y)Y(PO4)
KPotassium
Kⓘ AnniteKFe32+(AlSi3O10)(OH)2
Kⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Kⓘ MicroclineK(AlSi3O8)
Kⓘ MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Caⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Caⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Caⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O
TiTitanium
Tiⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
FeIron
Feⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Feⓘ AnniteKFe32+(AlSi3O10)(OH)2
Feⓘ AlmandineFe32+Al2(SiO4)3
Feⓘ BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Feⓘ Columbite-(Fe)Fe2+Nb2O6
Feⓘ HematiteFe2O3
Feⓘ IshikawaiteU4+Fe2+Nb2O8
Feⓘ MagnetiteFe2+Fe23+O4
Feⓘ NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
YYttrium
Yⓘ Fergusonite-(Y)YNbO4
Yⓘ Xenotime-(Y)Y(PO4)
NbNiobium
Nbⓘ Fergusonite-(Y)YNbO4
Nbⓘ Columbite-(Fe)Fe2+Nb2O6
Nbⓘ IshikawaiteU4+Fe2+Nb2O8
CeCerium
Ceⓘ Allanite-(Ce)(CaCe)(AlAlFe2+)O[Si2O7][SiO4](OH)
Ceⓘ Monazite-(Ce)Ce(PO4)
UUranium
Uⓘ AutuniteCa(UO2)2(PO4)2 · 10-12H2O
Uⓘ IshikawaiteU4+Fe2+Nb2O8
Uⓘ Meta-autuniteCa(UO2)2(PO4)2 · 6H2O

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

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

Lane, Alfred C. (1937) Exhibit 7; Work at Harvard University (in Lane, A. C. and Marble, J. P.), Report of the Committee on the Measurement of Geologic Time, National Research Council, Washington, DC, p. 59-61.
Yedlin, Leo Neal (1942) Standpipe Hill, Topsham, Maine, Rocks and Minerals, 17:206-208.
King, Vandall T. (1993) Critical Areas Program. Preliminary Report to the Eastern Federation of Mineralogical and Lapidary Societies, Rochester Academy of Science, Rochester, NY, pp. 42.
Hanson, S. L., Simmons, W. B., and Falster, A. U. (1995) Ishikawaite, Polycrase, or "Samarskite" in Maine Pegmatites?, Rochester Mineral Symposium, Program and Abstracts, 22:14-15.
Hanson, S. L., Simmons W. B. and Falster, A. U. (1998) New Data on Nb-Ta-Ti Oxides from the Topsham Pegmatite District, Eastern Maine. Canadian Mineralogist. 36, p.601-608.
Hanson, S. L., Simmons, W. B., Falster, A. U., Foord, E. E., Lichte, F. E. (1999) Proposed nomenclature for samarskite-group minerals: new data on ishikawaite and calciosamarskite. Mineralogical Magazine, 63 (1) 27-36 doi:10.1180/002646199548286
Nemetz, Janet and King, Van (2014) Re-investigation of the Yedlin Locality, Topsham, Sagadahoc County, Maine, USA, Rochester Mineral Symposium, Program and Abstracts, 41:22-23.
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