83 Lyons Week (3) the core running into S.W. 544.7 is flanked on the S.W. by nearly 100 feet of acid & similar tuffs with little shale & trffaceous shale. These tuffs overly a galbo intrusion which forms the hill. Another thick rhyolite tuff near gray-white, massive, ocure on the west flank of this trap was forming a strap about 250 ft. broad along the west side of Lyons Week