53 The Middlk Devoxiax Deposits of Marylaxd 



tains is a narrow belt wliich extends two-thirds of the distance across the 

 state and in the smaller valley to the east of Collier Mountain is a 

 narrower area with less than half the length of the one just described. 

 Immediately to the east is a belt of Oriskany sandstone and then the 

 largest continuous area of Romney in the county is reached which extends 

 for 8 miles along the Potomac Eiver and may be called the Oldtown area 

 fron; the village of that name in the Potomac valley about two-thirds of 

 the distance across the area. In its western part the uplift of Warrior 

 Mountain brings up the Oriskany sandstone and Helderberg limestones 

 while the similar uplift of Stratford Eidge in its eastern part exposes the 

 Oriskany. About half-way across the county the area greatly decreases in 

 breadth and skirting the eastern side of Warrior Mountain and Iron Ore 

 Ridge enters Pennsylvania to the northeast of Flintstone where it is 

 about three- fourths of a mile in breadth. 



The most western area in Washington County extends as a narrow belt 

 from the northeast to the soutJiwest just west of Tonoloway Ridge and 

 may be called the Tonoloway area. It crosses the Potomac River into 

 West Virginia a short distance west of Great Cacapon. Further east 

 in the Hancock area, is a belt about one-half mile in width, upon 

 which Hancock is situated, which crosses the county in a direction 

 parallel to the one just described. The largest area in the county enters 

 it to the southwest of Warren Point, Pennsylvania, makes a horseshoe 

 curve about Elbow Ridge, returns into Pennsylvania crossing Licking 

 Creek, and then turns and recrosses Washington County from the north- 

 oast to the southwest reaching the Potomac River at the mouth of Licking 

 Creek. Since this area crosses Licking Creek several times it may be 

 termed the Licking Creek area. To the southeast is the Ernstville-McCoys 

 area which begins at Ernstville and extends eastward to the uplift of 

 North Mountain. The lower shales are shown in Ernstville, and at ]\Ic- 

 Coys Ferry are exposures of the Hamilton beds containing an excellent 

 representation of the Hainiltou fauna. This area is the farthest east that 

 the Romney formation is known in Maryland. 



In Garrett County the Romney formation is not known to reach the 

 surface, although there is a considerable area of the overlying Jennings. 



