Gushing — Geology of Clinton County. 578 



The average dip is ten degrees to the east, while the Potsdam, less than a 

 mile to the westward, has a slight northerly dip, the Tracy brook fault lying 

 between. What is known as the King's bay quarry, is here in the Mad urea 

 beds, and formerly considerable stone was taken out here. 



Three miles further north, and about two miles southwest of Rouse's 

 Point, another ridge of Chazy limestone protrudes above the surface, and has 

 been quarried somewhat. Only a few feet in thickness of the Maclurea 

 beds are seen here. They have the same easterly dip as at King's bay, 

 though steeper, while on the west are nearly horizontal beds of the lower 

 Calciferous, marking the further extension of the Tracy brook fault. 



Trenton, limestone. The road south from Rouse's Point runs for two 

 miles just east of a low rock ridge, covered only skin deep by soil. A small 

 opening in the rock, about two miles south of the Point, discloses Black 

 river limestone, striking with the ridge, and therefore probably forming the 

 whole of it. The dip is in the same direction as is that of the Chazy, a mile 

 to the westward, so that both probably lie in the same fault block. This is 

 the only exposure of undoubted Trenton (inclusive of Black river) in the 

 township known to the writer. Just to the east, and occupying the larger 

 part of the peninsula north of King's bay, is a considerable marsh which marks 

 a fault line, beyond which are exposures along the lake shore at Stony Point 

 and Point an Fer. On Stony Point is the Utica slate, as already described. 

 At Point au Fer is a rocky cliff, extending several rods along shore, and 

 exposing from fifty to one hundred feet of rock, the lower portion consisting 

 of dark blue, somewhat slaty limestone, much jointed and with the cracks 

 commonly filled with calcite ; while the upper part is well laminated and 

 quite argillaceous, splitting into thin, even slabs, and weathering to a light 

 color. No fossils were found here, and the stratigraphic position of the beds 

 is doubtful in so far that it is uncertain whether they belong below or above 

 the Utica horizon. They are certainly not older than the Trenton, and are 

 provisionally mapped as of that age. 



