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Wanaque Mines (Wynokie Mines; London Mine; Laurel Mine; Laurel Hill Mine; Iron Hill Mine; Red Mine; Blue Mine), Bloomingdale, Passaic Co., New Jersey, USA

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Latitude & Longitude (WGS84): 41° 0' North , 74° 19' West
Latitude & Longitude (decimal): 41.00000,-74.31667
GeoHash:G#: dr71hzu62
Locality type:Group of Mines
Köppen climate type:Dfa : Hot-summer humid continental climate

Ref.: The Iron Mines of New Jersey (1910), Bayley: 472-473; NJ State Geol. Annual Rpts.: (1868): 545-546; (1873): 52; (1879): 61; (1886): 152; (1891): 248-249. An iron mine in magnetite ore located about 2¼ miles West of Midvale, placing it in present day Bloomingdale Borough. Started before 1857 (2nd. mine near the close of the 18th century). Reopened 1886, 1890 to about 1890, then 1905. Ore deposit was comprised of the London vein (9 to 10 feet thick x 500 feet long). Workings featured 2 openings ½ mile apart. Both mines had prior names: Southern mine: London, Iron Hill and Blue Mine; northern: Laurel, Red & Laurel Hill Mine.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

2 valid minerals.

Detailed Mineral List:

Formula: ☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Reference: The Iron Mines of NJ (1910), Bayley: 472; NJ State Geol. Ann. Rpt. (1856): 152.
Formula: Fe2+Fe3+2O4
Reference: The Iron Mines of NJ (1910), Bayley: 472.
'Mica Group'
Reference: The Iron Mines of NJ (1910), Bayley: 472; NJ State Geol. Ann. Rpt. (1856): 152.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Group 9 - Silicates
Unclassified Minerals, Rocks, etc.
'Mica Group'-

List of minerals arranged by Dana 8th Edition classification

Unclassified Minerals, Rocks, etc.
'Mica Group'-

List of minerals for each chemical element

H Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
O Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
O MagnetiteFe2+Fe23+O4
Al Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
Si Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
Ca Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
Fe Ferro-hornblende☐{Ca2}{Fe42+Al}(AlSi7O22)(OH)2
Fe MagnetiteFe2+Fe23+O4

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

1000 - 1200 Ma

ID: 2725783
Hornblende Granite

Age: Stenian (1000 - 1200 Ma)

Stratigraphic Name: Byram Intrusive Suite

Description: Pinkish-gray- to medium-buff-weathering, pinkish-white or light-pinkish-gray, medium- to coarse-grained, gneissoid to indistinctly foliated granite and sparse granite gneiss composed principally of microcline microperthite, quartz, oligoclase, and hornblende. Some phases are quartz syenite or quartz monzonite. Includes small bodies of pegmatite and amphibolite not shown on map. U-Pb age approximately 1,090 Ma (Drake and others, 1991b).

Comments: Byram Intrusive Suite (Middle Proterozoic) (Drake, 1984) Original map source: Dalton, R.F., Herman, G.C., Monteverde, D.H., Pristas, R.S., Sugarman, P.J., and Volkert, R.A., 1999, New Jersey Department of Environmental Protection, Bedrock Geology and Topographic Base Maps of New Jersey: New Jersey Geological Survey CD Series CD 00

Lithology: Major:{granite}, Minor:{gneiss,quartz syenite,quartz monzonite}, Incidental:{pegmatite, amphibolite}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

1000 - 1600 Ma

ID: 3188605
Mesoproterozoic crystalline metamorphic rocks

Age: Mesoproterozoic (1000 - 1600 Ma)

Lithology: Paragneiss; paragneiss

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

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