WARREN COUNTY. 385 
sand. The courses overlying these beds are enabled by their chemical 
composition, as it appears, to resist the action of fire toa good degree, and 
are accordingly known as fire stone. The general composition of the group 
ean be seen from the appended analysis: 
Wonbonahenoteime nese te ee oe eve IN ie liye 3i des ciara dusfstatatsiate ura ale alsiciaie Oe 85.21 
CanbonaeloeemagnesiavencedijoccuceeL atlssicclo\satamclecass grata eae iat Sra 13.56 
Nidan Ses CO UIOXId CrOfiTO Mae micas as anialeie sans ata cis alee nia sroiel ie eie Wve nie 2 0.80 
SVU ORO UUVES, THANE BL HONE eee A ete Te ia el a 0.35 
99.92 
This portion of the series serves a very useful purpose in this respect. 
Chimney jambs manufactured from it have been kept in constant use for 
fifty years without being defaced. 
The fossils of this series are also very interesting. Mention will here 
be made of only one—a unique specimen obtained from the Burnett farm, 
near Waynesville, and now in possession of Israel Harris, Esq., of this 
place. The fossil is probably a fucoid or sea-weed, but it simulates in its 
mode of growth, especially in its branches, land-plants, none of which have 
yet been found as low in the rocks. It has been described in the trans- 
actions of the Lyceum of Natural History of New York by Dr. Newberry 
as Fucoides Harrist. | 
The thickness of the Clinton limestone in the county does not exceed 
twenty feet, and falls below this in an included section measured on the 
farm of Dr. William Stokes. ; | 
 Allofthe characteristics of the line of junction of Lower and Upper Silu- 
rian, described in the report on Montgomery county, are to be observed in 
the exposures of this line in Warren county. A small outlier of Clinton 
limestone that occurs on the east side of the Miami, near Freeport, deserves 
mention in this report, though place could, perhaps, more appropriately 
be found for it under the head of the glacial agencies shown in the county. 
The outlier has been known from early days in the neighborhood as the 
Betty Hedy quarry. It embraces about three-fourths of an acre, and is 
about sixteen feet in thickness. The peculiarity of its history is that it 
has been transported to its present position bodily from some adjacent 
locality. It is marked upon the map as outlier C. It overlies drift ma- 
terials, such as glacial clays and gravel, and is one hundred and twenty- 
five feet below the elevation required for the formation at this point. 
There is no evidence whatever of any dislocation of the strata generally 
at this point, and we are compelled to regard it as a gigantic bowlder, 
transpovted from the opposite side of the river by the great glacier which 
occupied Southern Ohio in the earlier stages of the Drift period. Accord- 
25 
