Part I. Report of progress in 1869, by J. S. Newberry, chief geologist. Part II. Report of progress in the second district, by E. B. Andrews, assist. geologist. Part III. Report on geology of Montgomery County, by Edward Orton, assist. geologist.

78
S.Stonte laminated. i —_ S.S.
i.' Buff Col'd S.S.
5.
9 -./ I"'S.S..interstratified With Conglomerate
1 l /
Blue S.S.
1 i.C. ~S.S.
8,t.j Conglomerate
6 //:s.s.Clay;:.'C Clay:: S.
l8 Bue Clay
I~.'
FIG. 4.
These layers, though generally fine grained blue sandrock, and much
resembling, lithologically, the typical Waverly of the Ohio river, show at
nearly all the seams a tendency to the coarseness of conglomerate. There
is the evidence that at times the water currents swepti along with sufficient force to carry very coarse gravel, while, at other times, the waters
were more quiet, and deposited fine sand intimately mixed with clay. It
is in the finer material that the marine plants (fucoids) are found,
while the animal fossils, such as the Syringothyris, typa; are often
found in the coarser deposits. Beautiful impressions of flexible stalks of
fucoids are here seen. One species shows a peculiar system of transverse
ridges much resembling those seen in the stems of the Rusophycus of
the Clinton rocks.
There are several distinct species of these curious flexible stems to be
found in the conglomerate and Logan Sandstone groups. The same are
found in the upper Waverly, in the one hundred and fifty feet of finegrained sandstone lying next below the Sub-carboniferous limestone in
the Kentucky hills opposite Wheelersburg, Scioto county.
Above the group of the last section come in the heavier beds of conglomerate, well exposed at the Falls of the Hocking, one mile above
Logan. Here deep pot-holes have been worn in the conglomerate. There
are probably twenty feet of the conglomerate at this place, although the
bottom was nowhere seen. A mile below, at the mouth of Scott's creek,
a higher layer of coarse conglomerate is well exposed, and above this
several thin layers of conglomerate, alternating with fine grained sandstone. The following section shows these rocks. See Fig. 5.