Note 195 — Chapter XVI
Reading edition
While the mass of the White Mountains is probably older than the Silurian, there are beds of mica schist which contain corals of the genus Halysites, and stems of large crinoids.
Reading edition
While the mass of the White Mountains is probably older than the Silurian, there are beds of mica schist which contain corals of the genus Halysites, and stems of large crinoids.