Old Mine, Chester Emery Mines, Chester, Hampden Co., Massachusetts, USA
|Latitude & Longitude (WGS84):||42° 16' 45'' North , 72° 59' 17'' West|
|Latitude & Longitude (decimal):||42.27936,-72.98809|
This mine is the most extensive of the mines in the group, and it is the mine which has received the most attention from collectors and scientists over the years. Nearly all of the mineralogical studies which have been undertaken in regards to these mines have been done using samples from the Old Mine - very few samples from any of the other mines have been analyzed.
Of note, when walking along the river bank at this location, you are actually walking on an old railroad spur that once served the mines at this location. It branched off of the Boston & Albany RR main line, which today is operated by CSX.
25 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
|Dapingian - Tremadocian|
467.3 - 485.4 Ma
Age: Ordovician (467.3 - 485.4 Ma)
Stratigraphic Name: Moretown Formation
Comments: Part of Rowe-Hawley Zone (Ordovician and Older Rocks). Early Ordovician age from zircons (479+/-8 Ma) constrains the age of the previously undated Moretown Formation to Early Ordovician or older. Moretown had been interpreted as Middle Ordovician based on correlations with the Beauceville Formation of southern Quebec and the Missisquoi Formation of VT (Karabinos and Williamson, 1994) per MA005.
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. 
Mineralogical Record (1978): 9: 235-242.