Millington Quarry (Morris County Crushed Stone Co. Quarry ...
Millington Quarry (Morris County Crushed Stone Co. Quarry; Tilcon Quarry), Bernards Township, Somerset Co., New Jersey, USA : Amygdaloidal cavities in the Hook Mountain (Third Watchung) basalt. Quarrying began in 1895, and continued on and off, until the early 1970's. After a period of inactivity, the quarry restarted in ...