GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 303 



Feet 



Red conglomeratic sandstone. Coarse heavy bedded 

 sandstone of dull brownish hue, containing dis- 

 seminated pebbles and conglomeratic streaks, 

 differing from the overlying beds chiefly in color. 

 In both series the pebbles and conglomeratic 

 streaks are scattered and irregular, while the sands 

 are often coarsely crossHbedded. Thin layers of 

 red shale occur, and locally gray sandstones. The 

 rocks have much more the as])ect of a conti- 

 nental formation than of an estuarine formation, 

 and maj^ very well represent the accumulations on 

 the flood plains and deltas of large rivers, at a 

 moderate level above the sea. Thickness of con- 

 glomeratic sandstone 1375 



Oneonta {Upper flagstone series) 3000 



Thin and thick bedded sandstones from 20 to 200 feet 

 thiek with intercalated red shales up to 30 feet 

 thick. The sandstones are chiefly light gray to 

 gray brown in co'lor, and contain many beds suit- 

 able for flagstones or " blue stone." Heavy cross- 

 bedded lasers occur, and occasional dark shale 

 layers. Local occurrences of conglomerates. The 

 formation is best exposed in the upper Esopus and 

 Kondiout valleys. 



Sherhurne (Loiver flagstone scries) 500 



Thin bedded sandstones, with intercalated beds of 

 dark shale. The sandstones are in masses froni a 

 few inches to 40 feet in thickness, greenish gra^' to 

 light bluish gray or dark gray in color and are ex- 

 tensively quarried as flagstones. Occasional thin 

 streaks of quartz conglomerate occur. 



Hamilton shales 600 



Dark gray to black or brown shales with thin 

 arenaceous beds in the upper part. The best ex- 

 posure is in Mount Marion, southwest of Sauger- 

 ties.i The following species are recorded by Pros- 

 ser from this localitv.^ 



^Mt Marion station is on the West Shore Raih'oacl about 8 miles north of 

 Kingston. The best locality for collecting fossils is in a cliff 100 feet high 

 on the ^Yest bank of the Plaaterskill, where this stream is crossed by the 

 highway west of Mt Marion station. 



^Prosser, Charles S. Classification and Distribution of the Hamilton and 

 Chemung Series of Eastern N. Y., pt 2. N. Y. State ]Mus. 51st An. Rep't 

 1899. V.2. 



