215 



schoolbouse east of Iliiidoslnn, and another just west of Hubbard's Gap. 

 East of the raih-oad, about two miles southeast of Gosport, a small area 

 of this formation is half submerged in glacial sand. Another small 

 triangular area, with strata dipping to the east, lies on the east side of 

 a ridge a mile south of the Beau Blossom Church. Besides the patches 

 mentioned, there are several other small ones of this formation in the area. 

 In addition to these, main lobes extend to the east from the limestone belt 

 for several miles. One of these lobes extends in a linear strip to Union- 

 ville. From there it turns back toward the northwest for three miles. 

 This strip is the watershed of the region through which it extends. On 

 the limestone lobes are located most of the roads in the Knobstone region. 

 The Harrodsburg limestone as exposed on Ellet's hill is G5 feet thick. Its 

 lower portions are limestones containing a great number of geodes, oi 

 "mutton heads," which range in size from a pea to a bowlder two feet in 

 diameter. Above the geode laj^ers the stone contains pyrite, is somewhat 

 crystalline, and is tinted with blue, gray, or green. 



This limestone is thin-bedded. The bedding planes separating the 

 sti'ata are, in many instances, lenticular, intercalated masses of chert. 

 The strata were found to be more massive toward the top of the formation. 

 Also as the top of the formation is approached the limestone gives up 

 its molluscan fauna and takes on a Byrozoan fauna. 



"The contact of the Harrodsburg and oolitic limestones is almost 

 always marked by a 'crowfoot' (stylolite), with which are associated 

 masses of silicified oolitic fossils and black siliceons masses."* 



To the present time the Harrodsburg limestone has proved of com 

 mercial value only for macadamizing purposes. 



The Salem limestone lies above the Harrodsburg limestone and beneath 

 the Mitchell limestone. It forms a belt about three miles in width. It 

 begins near Gosport and extends beyond Bloomington, embracing the 

 quarry districts of Big Creek, Stinesville, EUetsville and Bloomington. 

 Beside the belt strip there are several detached areas. One caps Ellet's 

 hill, near Lemon Post Office. This latter patch covers an area of about 

 ten acres. The oolite of this patch is of average thickness and is of fair 

 quality. It is massive, free from lamination and bedding planes. 



■^Siebenthal, loc. cit. p. 298. 



