Trap, blended, or intimately mixed with hornblende ſlate, wacken, mullen, or kragg. / Talcoſe Argillite. / Calciferous Argillite. / Hornblende Slate, penetrated with talc or mica. / Hornblende, penetrated with garnets. / Hornblende Slate, penetrated with an exceſs of quartz. / Mullen, penetrated with aſbeſtinite.