CARBONIFEROUS SYSTEM. 149 



tween the Carboniferous and Silurian formations, probably belonging to the 

 latter. 



Along Lynch Creek there is a bed of very hard black thin-bedded lime- 

 stone, that can be obtained in very large slabs of uniform thickness. These 

 slabs would make very fine flagstones. The sandstones are on the north 

 side of the creek, and the limestone on the south, all the way from its head 

 to the Colorado River. The creek seems to run on the contact between the 

 limestone and the sandstone the entire distance from the head to its mouth. 

 On the west side of the Colorado, there is a fine exposure of the Carbonifer- 

 ous shale, with thin beds of black limestone below. In the limestone and in 

 the top of the shale are many fossils. The species are quite numerous and 

 very abundant. Just above the limestone, in the black shale, part of the 

 head of a vertebrate was found which resembles Edestus vorax. 



The following section, made on the south side of the Colorado River, near 

 Bend postoffice, will give the relation of the strata: 



Feet. In. 



1. Conglomerate 7 



2. Brown shale 20 



3. Black shale 22 



4. Limestone, black, hard 4 



5. Bluish shale 3 



6. Limestone 4 



T. Bluish shale 3 5 



8. Blue limestone, bed of river 6 



The strata dip If degrees north 23 degrees west. There are two lines of 

 jointing, one north 11 degrees east, the other north 47 degrees west. 



In No. 4 of the above section there are large masses of coral Chaetetes 

 radians, that I have seen only in this limestone. This species is not mentioned 

 in Miller's "N. A. Paleontology" as occurring in North America. 



At the mill near the mouth of Rough Creek the sandstones lie immediately 

 upon the limestone, the shales having entirely disappeared below the sand- 

 stone, showing an overlap. Up the west side of the creek are the massive 

 limestone hills extending for a mile or more, but in the next hollow the sand- 

 stone is found on top of the limestone as before. The sandstone is here com- 

 posed of larger grains of sand than before observed, and has more the ap- 

 pearance of a conglomerate. South of this, Rough Creek cuts through the 

 massive limestone, below which is the thin-bedded black limestone, from 

 which the same fossils were secured as were gotten at other localities. 



Two miles southeast of Mrs. Houston's, on Cherokee Creek, there was said 

 to be a stratum of lithographic stone. The stone was found in a cave as 

 represented, but the quality is not good enough to make it of any commercial 

 value. One-half mile southeastward the same stratum of lithographic stone 



