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Beaver Meadow Road - State Route 9 Interchange, Haddam, Middlesex Co., Connecticut, USA
Detailed Mineral List:
| Albite | ||
| Formula: | NaAlSi3O8 | |
| Colour: | white | |
| Reference: | Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409 | |
| Albite var: Oligoclase | ||
| Formula: | (Na,Ca)[Al(Si,Al)Si2O8] | |
| Reference: | Kevin Czaja Collection | |
| Almandine | ||
| Formula: | Fe2+3Al2(SiO4)3 | |
| Reference: | Kevin Czaja Collection | |
| 'Apatite' | ||
| Reference: | Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409 | |
| Babingtonite | ||
| Formula: | Ca2(Fe,Mn)FeSi5O14(OH) | |
| Reference: | Januzzi, 1976. Mineral Localities of CT and Southeastern NY State, p.209. | |
| Bavenite |  | |
| Formula: | Ca4Be2Al2Si9O26(OH)2 | |
| Habit: | blades, needles, platey, massive, in hemispherical and 2-D radiating aggregates | |
| Colour: | white to pale green | |
| Description: | probably the best material for the species in Connecticut. | |
| Reference: | Henderson, William, A., Jr. (1970): BAVENITE FROM CONNECTICUT. Mineralogical Record, volume 1, no. 2; Rocks & Minerals (1995) 70:396-409 | |
| Photo: © 2010 Harold Moritz. Bavenite from Beaver Meadow Road - State Route 9 Interchange, Haddam, Middlesex Co., Connecticut, USA | ||
| Bertrandite | ||
| Formula: | Be4(Si2O7)(OH)2 | |
| Habit: | Hemispherical aggregates and 2-dimensional sprays of radiating, acicular crystals | |
| Colour: | white | |
| Reference: | Rocks & Min.: 70:403; Mineralogical Record (1975) 6:114-123; Rocks & Minerals (1995) 70:396-409 | |
| Beryl | ||
| Formula: | Be3Al2(Si6O18) | |
| Habit: | elongated hexagonal prisms | |
| Description: | Crystals largely altered to bavenite at the small pegmatite. | |
| Reference: | Henderson, William, A., Jr. (1970): BAVENITE FROM CONNECTICUT. Mineralogical Record, volume 1, no. 2. | |
| 'Biotite' | ||
| Habit: | Anhedral folia | |
| Colour: | black | |
| Reference: | Harold Moritz collection | |
| Bismuthinite |  | |
| Formula: | Bi2S3 | |
| Habit: | Acicular | |
| Colour: | gray metallic | |
| Reference: | Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409 | |
| Photo: © 2010 Harold Moritz. Bismuthinite from Beaver Meadow Road - State Route 9 Interchange, Haddam, Middlesex Co., Connecticut, USA | ||
| 'Chlorite Group' | ||
| Habit: | Anhedral folia | |
| Colour: | dark green | |
| Description: | Associated with the cordierite, albite, quartz veins | |
| Reference: | Harold Moritz collection | |
| Cordierite |  | |
| Formula: | (Mg,Fe)2Al3(AlSi5O18) | |
| Habit: | Anhedral to blocky | |
| Colour: | gray-green to violet | |
| Reference: | Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409 | |
| Photo: © 2010 Harold Moritz. Cordierite from Beaver Meadow Road - State Route 9 Interchange, Haddam, Middlesex Co., Connecticut, USA | ||
| Dravite | ||
| Formula: | Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH) | |
| Reference: | Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409 | |
| Gedrite |  | |
| Formula: | ☐{Mg2}{Mg3Al2}(Al2Si6O22)(OH)2 | |
| Habit: | acicular prisms in 2-D rosettes and sprays | |
| Colour: | dark gray-green | |
| Description: | Excellent material was available from many large boulders at the rock dump area before it was developed, difficult to obtain from the roadcuts now. | |
| Reference: | Lundgren, Lawrence, Jr. (1979): THE BEDROCK GEOLOGY OF THE HADDAM QUADRANGLE. State Geological and Natural History Survey of Connecticut. Quadrangle Report No. 37, pages 9-13. | |
| Photo: © 2010 Harold Moritz. Gedrite from Beaver Meadow Road - State Route 9 Interchange, Haddam, Middlesex Co., Connecticut, USA | ||
| Magnetite |  | |
| Formula: | Fe2+Fe3+2O4 | |
| Reference: | [www.johnbetts-fineminerals.com] | |
| Photo: © 2001 John H. Betts. Magnetite from Beaver Meadow Road - State Route 9 Interchange, Haddam, Middlesex Co., Connecticut, USA | ||
| Molybdenite | ||
| Formula: | MoS2 | |
| Reference: | Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409 | |
| Monazite-(Ce) | ||
| Formula: | (Ce,La,Nd,Th)(PO4) | |
| Reference: | Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409 | |
| Muscovite | ||
| Formula: | KAl2(AlSi3O10)(OH)2 | |
| Habit: | anhedral folia | |
| Colour: | silvery | |
| Description: | Grains in the pegmatite | |
| Reference: | Harold Moritz collection | |
| Powellite | ||
| Formula: | Ca(MoO4) | |
| Reference: | Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409 | |
| Quartz | ||
| Formula: | SiO2 | |
| Habit: | anhedral | |
| Colour: | clear to white | |
| Description: | Large masses in the cordierite, albite, quartz veins | |
| Reference: | Harold Moritz collection | |
| Quartz var: Smoky Quartz | ||
| Formula: | SiO2 | |
| Habit: | anhedral | |
| Colour: | dark gray | |
| Description: | Prevalent in the pegmatite. | |
| Reference: | Harold Moritz collection | |
| Schorl |  | |
| Formula: | Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH) | |
| Reference: | Kevin Czaja Collection | |
| Photo: © 2010 Harold Moritz. Schorl from Beaver Meadow Road - State Route 9 Interchange, Haddam, Middlesex Co., Connecticut, USA | ||
| 'Tantalite' | ||
| Formula: | (Fe,Mn)(Ta,Nb)2O6 | |
| Reference: | Rocks & Min.: 70:403; Rocks & Minerals (1995) 70:396-409 | |
| Uraninite |  | |
| Formula: | UO2 | |
| Habit: | octahedral | |
| Colour: | black | |
| Description: | Associated with magnetite in pegmatite. | |
| Reference: | Anthony Albini collection | |
| Photo: © 2012 Anthony Albini. Uraninite from Beaver Meadow Road - State Route 9 Interchange, Haddam, Middlesex Co., Connecticut, USA | ||
24 entries listed. 18 valid minerals.
References
Bannerman, Harold M., Sidney S. Quarrier, and Richard Schooner. (1968): Mineral Deposits of the Central Connecticut Pegmatite District in Guidebook for Fieldtrips in Connecticut. State Geological and Natural History Survey of Connecticut. Guidebook No. 2, Trip F-6.
Henderson, William, A., Jr. (1970): Bavenite From Connecticut. Mineralogical Record, volume 1, no. 2.
Hiller, John Jr. (1971): Connecticut Mines and Minerals. Privately published.
Lundgren, Lawrence, Jr. (1979): The Bedrock Geology of the Haddam Quadrangle. State Geological and Natural History Survey of Connecticut. Quadrangle Report No. 37, pp. 9-13.
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, p. 403.
Henderson, William, A., Jr. (1970): Bavenite From Connecticut. Mineralogical Record, volume 1, no. 2.
Hiller, John Jr. (1971): Connecticut Mines and Minerals. Privately published.
Lundgren, Lawrence, Jr. (1979): The Bedrock Geology of the Haddam Quadrangle. State Geological and Natural History Survey of Connecticut. Quadrangle Report No. 37, pp. 9-13.
Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue), Vol. 70, No. 6, p. 403.
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