Intimately interfolded Littleton and Partridge Formations

In areas of poor exposure and incomplete mapping.
State Massachusetts
Name Intimately interfolded Littleton and Partridge Formations
Geologic age Lower Devonian and Middle Ordovician
Lithologic constituents
Comments Part of Merrimack Belt (Silurian, Devonian and Pennsylvanian Rocks) and Bronson Hill Zone (Ordovician and older rocks). Note that unit is labeled Dl+Ops on printed map.
References
NGMDB product
Counties Worcester