Maryland Geological Survey 4U7 



true dip and the average of tlie several determinations of dip 23° which, 

 after correcting and solving, gives a thickness of 2010 feet which being 

 very near that of the formation indicates that about its true limits were 

 taken. 



The contact of the Jennings and Catskill formations is not show^ 

 on this eastern limb of the anticline on the National Eoad; but it is 

 thought that the base of the Catskill formation is reached in the lower 

 part of the western slope of the first ridge west of Mr. Thomas Johnson's 

 house, about 4I/2 miles northwest of Frostburg. In the upper part of 

 the ridge the rocks are mostly reddish shales and thin bedded sandstones 

 with some thin bands of greenish shales and sandstones. The soil is 

 colored as red as that produced by the Catskill formation. The dip 

 varies from 20° to 22° to the east. On the eastern slope of the ridge 

 directly above Mr. Johnson's the shales and sandstones are a much 

 brighter red than the rocks in the upper part of the formation on the 

 western slope of Little Savage Mountain. It is believed to be generally 

 the case in western Maryland that the lower and middle parts of the 

 formation are a brighter red than the upper portion. For some distance 

 the rocks are mostly concealed but from the chapel on the western 

 slope of Little Savage Mountain to its sumrnit there are frequent outcrops 

 of the upper part of the Catskill formation. Just above the chapel is 

 a zone of greenish-gray, coarse grained, very micaceous sandstone suc- 

 ceeded by brownish-red rather coarse argillaceous shale. Then, after a 

 covered interval, there is a zone of greenish-gray, micaceous sandstone 

 and greenish shale; but it is much broken and hardly forms a ledge. 

 Higher, are broAvnish-red, thin bedded sandstones capped by brownish-red 

 arenaceous shales. Then there is another brownish-red, micaceous sand- 

 stone zone, massive and irregularly bedded with a dip of 22° S., 75° E. 

 Following this are red to brownish-red, micaceous, arenaceous shales 

 which run into thin bedded sandstones. Then, near the crest of the 

 mountain, is a conspicuous zone of greenish-gray sandstone and greenish 

 argillaceous shale having a dip of 25° with a horizontal distance of 270 

 feet, making it 113 feet in thickness. This, or a similar zone of greenish- 

 gray rock has been noted in a number of sections near the top of the 



