up first into irregular angular fragments and then dis- integrating into a bluish clay. This layer is considered the top of the Siver Silurian so that the same Silurian sec- tion north of the cut is estima- ted at 20 feet. Immediately overlying the last member a member of the Siver Silurian is a dark blue rock with large furcids marking its lower surface, and with fish teeth just above the base. Furcoidal markings are evidently also present at higher levels in this bed. Its thickness is 2 feet 6 inches. It is considered of devonian age. Overlying this are 2 feet of very light blue siliceous (roche) limestone with abun- dant chert concretions of small size, large net form hygroas, large crinoid stems. & A 4 inch layer of thin shale limestone with clay particles, containing a fair number of 31 snails which were collected. 2 feet 4 inches of blue limestone with chert, Cyzti phyllum. 5 to 6 inches of light blue lime stone, with large crinoid stems. This makes a total of 8 feet of Devonian rock below the strongly cherty beds next de- scribed! 4 ft 8 inches of a bluish white siliceous limestone, very full of chert layers and concre- tions, arranged in a very irreg- ular fashion along certain stratification planes. A spe- cially thick layer of chert marks the top of this series. The stone has a more or less crushed appearance. The chert contains Zaphren tus and other fossil. Part of junction City are places where it has a very abun- dant fauna. 6 to 7 feet of brecciated rock. When very brecciated in appearance it shows no