Dickerson Mine, Succasunna, Randolph Township, Morris Co., New Jersey, USA
|Latitude & Longitude (WGS84):||40° 51' 60'' North , 74° 37' 60'' West|
|Latitude & Longitude (decimal):||40.8666648865, -74.6333312988|
An iron mine in magnetite ore located about 3 miles SW of Dover. Started 1710 - 1713, reopened about 1860, worked 1862-1877, 1877-1891, 1905-Jan, 1908. This was one of the major iron mines in New Jersey and produced an estimated 1,000,000 tons of ore. The workings featured a shaft 1,300 feet (400 meters) deep. When reopened in 1905, the mine exploited new veins. Interestingly, the town of "Succasunna" means "black rock" in the local Lenni Lenape Indian language, in allusion to the magnetite deposits.
4 valid minerals.
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 Macrostrat.org
|Middle Cambrian - Early Cambrian|
501 - 541 Ma
Age: Cambrian (501 - 541 Ma)
Stratigraphic Name: Leithsville Formation
Description: (Wherry, 1909) - Light- to dark-gray and lightolive-gray, fine- to medium-grained, thin- to medium-bedded dolomite. Grades downward through medium-gray, grayish-yellow, or pinkish-gray dolomite and dolomitic sandstone, siltstone and shale to medium-gray, medium-grained, medium-bedded dolomite containing quartz sand grains as stringers and lenses near the base. Lower contact gradational. Thickness ranges from 0 to 56 m (0-185 ft) due to erosion.
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. 
USGS Professional Paper 287, 1958, PP 126-128