KNOX COUNTY. 339 



and is by barometer ninety feet below Gambier. Near Brownsville, it is 

 fifty-five feet, and south, at Millwood, ninety- five feet below Gambier. 

 These facts indicate a pretty uniform dip of this rock to the south-east, 

 and that it is a continuation of the coarse body of rock in the east part 

 of Richland county. On the C, Mt. V. & C. Railroad, half a mile east of 

 Howard station, a quarry belonging to Hurd & Israel has been opened, 

 at an elevation fifty feet below Critchfield's, of which the following is a 

 section so far as exposed : 



FEET. 



1. Shaly limestone with layers of argillaceous shale 20 



2. Massive sandstone 6 to 8 



The lower stratum is a coarse stone with much iron, containing pock- 

 ets of soft iron ore, in some places striped like the Mansfield stone, and 

 in others of a deep cherry red; general color yellow; fucoids the only 

 fossils observed. 



Indian Field Run, a small stream emptying into Owl Creek from Har- 

 rison township, and occupying a rocky valley of recent erosion, gives 

 fine exposures of the Waverly, where many of the layers are from three 

 to four feet thick, but they contain many concretions or pockets of iron 

 ore, and occasionally nodules of iron pyrites. Impressions of fucoids are 

 here abundant. The general color of the rock is yellow. The valley and 

 slopes are filled with the debris of the local rocks, with no icdications 

 of Drift except an occasional granitic bowlder. Near the top of the hill 

 on the west. Drift bowlders are more abundant, and heavy masses of 

 Drift cover the western slope descending toward Owl Creek. 



From thirty to forty feet of the bottom of the Waverly Conglomerate 

 has argillaceous bands interstratified with the quartz-bearing beds of 

 sandstone. Below this the mass of the material to the chocolate shales 

 is argillaceous, with frequent hard bands of calcareo-silicious rock, and 

 occasionally strata of sandstone. One of the latter. No. 19 of the general 

 section, is twenty- two feet thick, the upper part with argillaceous bands, 

 the lower carrying quartz pebbles ; another stratum, No. 21, one hundred 

 and twenty-five feet below the last, is a very fine blue compact sandstone, 

 bearing some resemblance to the finer grades of the Berea. It is not 

 persistent, and in most of the hills its horizon is occupied by argillaceous 

 shales. Indeed, all these thin beds of sandstone seem to disappear east- 

 ward, the whole interval between the Waverly Conglomerate and the 

 chocolate shale being filled with argillaceous shale. 



One hundred and fifteen feet below the hard blue sandstone mentioned 

 above, a similar rock occurs eight and a half feet thick, the upper part 

 dark colored. This is about on the horizon of the Berea grit, and it is 



