28 Report on the projected Survey of the State of Maryland. 



of this part is fully kept up, amid the more evident indications of an 

 advance upon the carboniferous groupe. The slaty, arenaceous and 

 limestone rocks of this region, contain also numerous impressions of 

 testaceous and crustaceous animals. But between these indications 

 merely, and the coal formations properly speaking, there intervenes 

 a mountainous district, which from its peculiar circumstances, and 

 the shortness of the time allowed for the examination, the under- 

 signed have not yet been able to examine. The only subject of in- 

 terest which fell under their notice, is the occurrence of mineral 

 springs. There can be little doubt, considering the healthfulness of 

 the country in which they are situated, with the grandeur of the moun- 

 tain scenery around them, that very soon they will induce near them, 

 with advantages that cannot be excelled, the establishment of places 

 of public resort, during the heats of summer, similar to those already 

 successfully founded in neighboring states. Most of the springs being 

 strongly impregnated with sulphuretted hydrogen, are of the kind 

 known as sulphur waters. They have been met with in several pla- 

 ces, but the only one which has as yet been brought into extensive use 

 is that at the foot of the Warrior mountain on the Flintstone. This spot 

 has moreover other attractions. It is a richly cultivated basin-shap- 

 ed valley of moderate extent, through which flows the Small stream, 

 called the Flintstone. A portion of its waters run along the base of 

 the Warrior mountain ; but much the larger part passes through the 

 mountain and issues from its opposite side. There is no doubt from 

 this, of the existence of a large cavern under the mountain, which is 

 composed of that variety of Hmestone already designated as cavern- 

 ous. 



Warm springs occur on the south side of the mountain ; but in 

 consequence of their present neglected state, their natural tempera- 

 ture could not be ascertained. 



The fifth and last geological division, which it is deemed expedi- 

 ent to make, comprehends the remaining portion of Allegany county 

 westward of Willis' creek. Some general remarks concerning this 

 very interesting part of the state, comprising its deposites of bitumin- 

 ous coal, and the iron ores frequently associated with them, will con- 

 clude what the undersigned have to report on the geology of Mary- 

 land. 



The carboniferous groupe of rocks, forming the most prominent 

 geological feature of Allegany county, consists principally of beds of 

 sandstone, slate^ shale, and coal, irregularly interstratified 5 besides 



