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Barker Hill Quarry (Townsend Quarry; Rusk Quarry), Townsend, Middlesex Co., Massachusetts, USA
List of minerals arranged by Dana 8th Edition classification
| Group 2 - SULFIDES | ||
|---|---|---|
| AmBnXp, with (m+n):p = 1:2 | ||
| Pyrite | 2.12.1.1 | FeS2 |
| Group 4 - SIMPLE OXIDES | ||
| AX2 | ||
| Rutile ? | 4.4.1.1 | TiO2 |
| Group 7 - MULTIPLE OXIDES | ||
| AB2X4 | ||
| Magnetite | 7.2.2.3 | Fe2+Fe3+2O4 |
| Group 51 - NESOSILICATES Insular SiO4 Groups Only | ||
| Insular SiO4 Groups Only with cations in >[6] coordination | ||
| Zircon | 51.5.2.1 | ZrSiO4 |
| Group 75 - TECTOSILICATES Si Tetrahedral Frameworks | ||
| Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si | ||
| Quartz | 75.1.3.1 | SiO2 |
| Group 76 - TECTOSILICATES Al-Si Framework | ||
| Al-Si Framework with Al-Si frameworks | ||
| Microcline | 76.1.1.5 | KAlSi3O8 |
| Unclassified Minerals | ||
| Albite var: Oligoclase-Albite | - | (Na,Ca)[Al(Si,Al)Si2O8] |
| 'Allanite' ? | - | |
| 'Apatite' | - | |
| Biotite | - | |
| 'Chlorite Group' | - | |
11 entries listed. 7 valid minerals.
References
Rocks & Minerals (1938): 13: 245.
Dale, T. Nelson (1910). Supplementary Notes on the Commercial Granites of New England; USGS Bulletin 470.
Dale, T. Nelson (1910). Supplementary Notes on the Commercial Granites of New England; USGS Bulletin 470.
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Updated Mineral Entry: BurpaliteFrom Uwe Kolitsch, 19th Jun 2013 07:01:17