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Chester, Hampden Co., Massachusetts, USA

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Latitude & Longitude (WGS84): 42° 16' 45'' North , 72° 58' 45'' West
Latitude & Longitude (decimal): 42.2791666667, -72.9791666667


The town of Chester was chartered as Murrayfield in 1765, and incorporated as Chester in 1783.

Mineral List

Mineral list contains entries from the region specified including sub-localities

43 valid minerals. 1 (TL) - type locality of valid minerals.

Rock Types Recorded

Entries shown in red are rocks recorded for this region.

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Regional Geology

This 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 data will improve over time as more accurate maps and data sets are added.

Ordovician - Neoproterozoic443.8 - 1000 MaNeoproterozoic-Ordovician sedimentary

Sedimentary

Middle Ordovician - Tremadocian458.4 - 485.4 MaMoretown Formation

Major:: {granofels},Minor:: {schist}

Moretown Formation - Light-greenish-gray to buff, fine-grained, pinstriped granofels and schist.

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.

Mesoproterozoic1000 - 1600 MaMesoproterozoic intrusive and metamorphic terranes

Intrusive and metamorphic terranes

Mixtures of metamorphic and intrusive or plutonic rocks, tracts known as crystalline, migmatitic terranes, moderately to highly metamorphosed rocks of unknown origin with or without intrusions. This classification is inherently prone to variable interpretation, as other compilers might distinguish some packages by their metamorphic or gneissic protoliths, and the associated age ranges may be more variable.


References for regional geology:

Data provided by Macrostrat.org

Garrity, C.P., and Soller, D.R.,. Database of the Geologic Map of North America: adapted from the map by J.C. Reed, Jr. and others (2005). U.S. Geological Survey Data Series 424 .

USGS compilers. State geologic map data. State Maps.

Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.


Localities in this Region


The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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