| Deposit ID | 10082365 |
|---|---|
| MRDS ID | W055100 |
| Record type | Site |
| Current site name | Cobb Mine |
| Alternate or previous names | Split Rock Mine |
| Geographic coordinates: | -74.44069, 40.96583 (WGS84) |
|---|---|
| Elevation | 293 |
Political divisions (FIPS codes)
Morris(county)
New Jersey(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Boonton(quadrangle 1:24,000 scale)
Newark(quadrangle 1:100,000 scale)
Newark(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Hackensack-Passaic(hydrologic unit)
Lower Hudson(hydrologic accounting unit)
Lower Hudson-Long Island(hydrologic subregion)
Mid Atlantic(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | New Jersey | Morris |
| Commodity | Importance |
|---|---|
| Iron | Primary |
| Materials | Type of material |
|---|---|
| Magnetite | Ore |
| Apatite | Gangue |
| Result | 59.79% FE, 0.426% |
|---|
| Host or associated | Host |
|---|---|
| Rock type | Metamorphic Rock > Gneiss |
| Rock unit name | Mixed Gneiss |
| Rock description | Mixed Gneiss |
| (1) | -74.44069, 40.96583 |
|---|
| Strike | N 55 E |
|---|---|
| Dip | 70 SE |
| Width | 1.52M |
| Development status | Past Producer |
|---|---|
| Commodity type | Metallic |
| Deposit size | Small |
| Significant | No |
| Year of first production | 1868 |
| Year of last production | 1881 |
| Ownership category | State |
|---|
| Type | Operator |
|---|---|
| Owner | Judge Cobb |
| Type | Owner |
|---|---|
| Owner | Jersey City Division Of Water. 575 Nj St Highway Rt 440, Jersey City, Nj 07305 |
| Type of workings | Surface/Underground |
|---|---|
| Overall depth | 36.58M |
| Overall length | 60.96M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| USGS | Mineral Resources Data System | MRDS | W055100 |
BAYLEY, WILLIAM S., 1910. IRON MINES AND MINING IN NEW JERSEY, VOL. VII OF THE FINAL REPORT SERIES OF THE STATE GEOLOGIST;
FIELD CHECKED 1986
ANNUAL REPORT OF THE STATE GEOLOGIST FOR THE YEAR 1868; COOK, GEORGE
COOK, GEORGE H., 1879. ANNUAL REPORT OF THE STATE GEOLOGIST FOR THE YEAR 1879.
| Subject category | Comment text |
|---|---|
| Deposit | ORE IS GRANULAR MAGNETITE WITH UP TO 1% APATITE |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Reporter | 01-DEC-1986 | Kaeding, Margaret E. (Bell, Christy A.) | New Jersey Bureau of Geology and Topography |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.