argillaceous-schist

Updated: May 22, 2025

Both the altered limestone and hardened slate contain garnets in many places, also ores of iron, lead, and copper, with some silver. The granite of Cornwall sends forth veins into a coarse argillaceous-schist, provincially termed killas. This killas is converted into hornblende-schist near the contact with the veins. These appearances are well seen at the junction of the granite and killas, in St.

Sir Charles Lyell - The Student's Elements of Geology