| Tilcon Nyack Quarry Nyack, NY formation- The quarry works in the diabase formations of the Palisades sill. Mineralization is limited to faces and fillings of seams in a few spots in the quarry. The deposits are very limited. The pit is only a few miles north of the NJ border and hence is included here Minerals collected- Magnetite Bornite Quartz Calcite - fluoresces red SW |
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