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SAND FOR MINE FLUSHING.
under the city of Scranton. One crushing plant is already in operation by the Nay Aug Stone Co., just below Nay Aug station. However, a large amount of stone is available farther down the gorge and therefore considerably nearer Scranton. Crushed rock from a quarry in this gorge could be loaded directly on empty coal cars and hauled down grade into Scranton.
The sandstones underlying the Pottsville conglomerate in the gorge of Leggetts Run present a thickness of about 800 feet, rising in high walls along the gorge 2 miles northwest of Providence. There is here available a very large amount of sandstone of moderate hardness, admirably located and physically well suited for sand for filling. The product could be hauled down grade on the Lackawanna Railroad or on the trolley line which follows the bottom of the gorge.
The hydraulic transportation of the fine crushed stone to the mine was not especially considered, but both on Roaring Brook and on Leggetts Creek the waters are so impounded that perhaps they are not continuously available for hydraulic work. The sandstones under the Pottsville conglomerate are exposed also in the valley of Meadow Brook in the southern part of Scranton, where they are utilized by the crusher now in operation. This crusher belongs to the Meadow Brook Co. and has a capacity of about 300 tons a day. Crushed stone from the exposures in this vicinity would be handled by the Laurel line and the Erie Railroad; possibly, also, it could be flushed down the bed of Meadow Brook, but the conditions are much less favorable for such tranportation than on Roaring Brook or Leggetts Creek.
There are extensive ledges of the sandstones of the coal measures in the high ridge extending west from Lackawanna River, just east of Holden, where a moderately large amount of gray sandstone is available. Another ledge appears on the north bank of Leggetts Creek, near its mouth. This ledge has been quarried extensively, but the quarrv could be extended over 1 or 2 acres to the north, lo the northwest it passes under the huge pile of culm from Leggetts Creek colliery. Sandstone ledges outcrop prominently in the high ridge on the east bank of Lackawanna River, a half mile east of Dickson, and a crusher could be established at this place with fair advantage, as the ledges are directly over extensive coal workings.
GLACIAL TILL.
The till left by the great continental glacier extends across northern Pennsylvania, and forms a mantle of irregular thickness and varying composition. In the Scranton region it covers much of the surface to a considerable depth, excepting the mountain slopes and summits, where it is thin or absent. The underlying coal-measure rocks also appear in places along the lower slopes of the