Matches in DBpedia 2014 for { ?s ?p The Massachusetts Hornfels-Braintree Slate Quarry is an archaeological site 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.It was added to the National Register of Historic Places in 1980.. }
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- Massachusetts_Hornfels-Braintree_Slate_Quarry abstract "The Massachusetts Hornfels-Braintree Slate Quarry is an archaeological site 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.It was added to the National Register of Historic Places in 1980.".
- Massachusetts_Hornfels-Braintree_Slate_Quarry comment "The Massachusetts Hornfels-Braintree Slate Quarry is an archaeological site 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.It was added to the National Register of Historic Places in 1980.".