Page:The Eurypterida of New York Volume 1.pdf/106

The peculiar yellow plattenkalke and marls of Oesel which contain the well known Baltic eurypterid fauna are of similar character with the Salina eurypterid beds.

A different rock facies containing eurypterids is represented in the Pittsford shale and the Shawangunk grit shale beds. In the former the fossils occur in a rather fissile, very dark olive-green to black shale. Its relations to the Salina section have been recorded by Sarle [1903, p. 1082].^[1]

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Top		Feet
10	Rondout. Upper portion, light weathering impure limestone; lower portion, a cement rock with cavities (see p. 170)	45
11	Cobleskill. Fossiliferous limestone gradually grading into the Rondout	6
12	Salina. Waterlime with Eurypterus	6
13	Salina. Soft, greenish shales	10
14	Salina. Gypsum beds, with intercalations of shale	65
		255

1.  

   SECTION IN OLD ERIE CANAL AT PITTSFORD

   Salina

   Top		Feet	Inches
   1	Red shale	6
   2	Light gray, compact, fine grained, dolomite, with imperfect conchoidal fracture, weathering light brown to cream color		10
   3	Soft, gritty mudrock, purple with bright red mottlings	1	3
   4	Dolomite like no. 2		4
   5	Purple shale with red mottlings	1	11
   6	Green shale	1	2
   7	Thin layer dolomite like no. 2		4
   8	Black shale, very compact, the base splitting unevenly; grading to olive-green shale in the upper part		10
   9	Dolomite like no. 2		10
   10	Black shale, with leaf of dolomite ½ inch thick 4 inches from its base	1	2
   11	Dolomite like no. 2		2
   12	Soft, green, arenaceous mudrock, occasionally becoming shaly; the lowest exposed rock of the cut	1	8