| Lat / long: | 41.11888, -74.58736 |
| Primary: | Zinc |
| Secondary: | Iron, Manganese |
| Tertiary: | Cobalt, Molybdenum, Nickel |
| Ore: | Willemite, Franklinite, Zincite, Sphalerite |
| Gangue: | Calcite, Augite, Diopside, Biotite |
| Orebody form: | CONFORMABLE, SYNCLINAL |
| Other material: | Molybdenite, Chloanthite, Arsenopyrite, Pyrite, Descloizite |
| Discovery year: | 1750 |
| Operation type: | Unknown |
| Production size: | Medium |
| Development status: | Past Producer |
| First production started: | 1845 |
| Host rock: | Franklin Marble Formation |
| Host type: | Marble |
| Associated rock: | Cork Hill gneiss, Furnace Magnetite Bed, Hardyston Quartzite, Kittatinny Limestone |
| Associated type: | Gneiss,Quartzite,Limestone |
| Structure: | Major Syncline, Numerous Cross Folds, Faults, Fractures |
| Tectonic: | Epicratonic Basin |
| Alteration processes: | Dolomitization |
| MRDS | W019035 |
| DEP | 10073174 |
| Reference | {Commodity:: BILBREY, J. H., 1962, COBALT, A MATERIALS SURVEY: U.S. BUREAU OF MINES INFORMATION CIRCULAR 8130, P. 30.}{Deposit:: PALACHE, C., 1935, THE MINERALS OF FRANKLIN AND STERLING HILL, SUSSEX COUNTY NEW JERSEY: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 180.}{Deposit:: PINGER, A. W., 1950, GEOLOGY OF THE FRANKLIN - STERLING AREA, SUSSEX COUNTY, NEW JERSEY; INTERNATIONAL GEOLOGICAL CONGRESS, 18TH, PT. 7 P. 77 - 87.}{Deposit:: BROWN, J.S., ORE DEPOSITS OF THE NORTHEASTERN UNITED STATES, IN RIDGE, J.D., ED., ORE DEPOSITS OF THE UNITED STATES 1933-1967 (GRATON-SALES VOLUME) V. 1: AMERICAN INSTITUTE OF MINING, METALLURGICAL AND PETROLEUM ENGINEERS, P. 1-19.} |
| Reporter | Woodruff, Laurel G., Coury, Anny B., King, Robert U., Schruben, Paul G. and Wedow, H., Whitlow, S. |