Page:Report on the geology of the four counties, Union, Snyder, Mifflin and Juniata (IA reportongeologyo00dinv).pdf/365

Rh Glamorgan furnace about 1500 tons of Sand Vein fossil and from 800 to 1000 tons from the Ginger Vein. The average height of the stopes was about 50′. The basin between the two outcrops of fossil ore is filled with the lower Salina shales and slates.”

Some little development has also been made in past times on the extreme south outcrop of the Sand Vein on the south side of the Blue Ridge anticlinal. The Ore sandstone makes quite a prominent terrace ridge here for something over a mile east of Grahamville, forming a sure guide to the location of the overlying fossil ore.

Along Big run, a branch of Lost creek, which makes a wide gap in Slenderdale ridge, the Ore sandstone measures are exposed and apparently make a double anticlinal; a southern one, burying the Ore sandstone soon after crossing the creek, but the northern and stronger one still keeping these measures above water level for one-half miie west of the creek. Along the road the southern anticlinal creates a beautiful arch in the Ore sandstone 60′ above creek level. The sandstone is about 25′ thick but occurs in thin beds with dips of 5° southeast and 20° northwest.

Some abandoned ore openings were seen in the synclinal north of this axis, most of which were very small and never seem to have been very successful.

Towards the north end of the gap and about 50′ above the level of the stream, an old drift had evidently developed the Sand Vein on its south dip in the north anticlinal. It has been long abandoned and the timbers were so rotted that it was impossible to examine the opening, but it evidently furnished some good soft fossil ore. It was opened by Simon Mumma and it is claimed that the bed was about 2′ thick, but carried some “Jack” mixed with it. It is also said to show a sandstone floor with a gentle southeast dip. The same ore was struck higher on the ridge on a steep north dip, the bed furnishing about 12 inches of ore.

The Ore sandstone to the north of it outcrops at the bend of the road on a 40° southeast dip, underlaid by reddish