136 NEW YORK STATE MUSEUM 



lower portion is q^uarried together with the Manlius and manu- 

 factured into Portland cement. In composition it is similar to 

 the Manlius, though in texture it is always a sandrock. 



The most accessible exposure of the Coeymans in the Schoharie 

 region, is in " the rocks " which extend in a cliff from behind the 

 cemetery at Schoharie southward till they cross the Middleburg 

 road about a mile south of Schoharie courthouse. The rock has 

 been quarried at two places for road metal, one in the cliff back 

 of Schoharie courthouse, and the other at the northern end of 

 Lasell park. Though the formation is well exposed on West hill, 

 only the upper layers can be examined, as the lower 25 to 30 feet 

 forms an almost inaccessible perpendicular or overhanging cliff. 

 On the road leading up West hill, however, a short distance be- 

 yond the point where it branches off from the East Cobleskill 

 road, a good section of the formation is found. The lowest beds 

 exposed in the cliff along the roadside are the upper Manlius beds, 

 of which about 33 feet are shown. These are succeeded by about 

 32 feet of massive Coeymans, part of which is quarried by the 

 roadside. Above this are abont 20 feet more, forming low ledges 

 in the field, and then follow^s a slope of New Scotland [see section 

 fig. 198]. Southw^ard good outcrops are found behind the Gebhard 

 farm in cliffs below the road [map: IX h, 46]. Good cliffs of 

 lower Coeymans, rich in fossils, are also found south of the Cobles- 

 kill, between Braymanville and the Howes Cave road [map: 

 VI f, 32] and again halfway between Braymanville and Barner- 

 ville [map : V b, 30] where ledges of Coeymans traversed by wide 

 master joints, project into the Cobleskill for some distance. At 

 Barnerville, ledges of Coeymans with fossils are well exposed in 

 the village and on the south banks of the stream. On Barton hill 

 good exposures of the Coeymans are found in low cliffs which 

 almost encircle the hill. 



Fossils of the Coeymans 



The following are some of the more characteristic species. 

 Crinoids. M e 1 o c r i n u s p a c h y d a c t y I u s [fig. 33] . 

 This large and beautiful species was found in the shaly layers 



