Massachusetts Hornfels-Braintree Slate Quarry

Massachusetts Hornfels-Braintree Slate Quarry
Hornfels
Nearest city Milton, Massachusetts
Area 63 acres (25 ha)
Built 1825
Governing body Local
MPS Blue Hills and Neponset River Reservations MRA
NRHP Reference # 80000653[1]
Added to NRHP September 25, 1980

The Massachusetts Hornfels-Braintree Slate Quarry is an archaeological site[2] in Milton, Massachusetts. It consists of a series of pits and trenches used from 7,000 B.P. until the early 17th century as a source of slate and hornfels used for chipped and ground tools. Pieces made from material quarried at the site are found over much of eastern Massachusetts.[3]

The site was added to the National Register of Historic Places in 1980.

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