Plate V. Photograph of fossil casts of ice crystals seen on the under
side of flaggy layer of calcareous sandy rock in the upper part of the
Eagle Ford at Fossil Knobs, about two miles northwest from the Chisos
Mining Company's property, Brewster County, Texas. It will be seen that
some of the crystals are gently curved. Similar curving crystals are
also seen in the figures showing recent growths at Rock Island,
Illinois. Compare with Plate IX. Slightly reduced.
[Illustration: PLATE V]