Miarolitic cavities in Drammens granite near contactzone with hornfels
Ref.:
-Eldjarn, K. (1994): Uvitt-dravitt fra Borgenåsen, Asker. STEIN 21 (2), 148-151
Miarolitic cavities in granite close to the contact with cambrosilurian sediments altered to hornfels. Many cavities were exposed during a period of development in the 1970'ies.