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NEW YORK STATE MUSEUM 



The transition to the Coeymans is abrupt. These 

 higher beds are best exposed in the city quarry 

 near the Hudson cemetery. 



Hudson river beds. The lowest beds exposed in this region are 



the Hudson river shales and sandstones. These are best shown 



at the northern end of Mt Moreno, just south of the city of 



Hudson. A quarry at the extreme northern end of the hill shows 



mudrocks and sandrocks, forming- a pitching anticline. Some of 



the beds are carbonaceous and in these graptolites of lower Cham- 



plainic or Beekmantown age occur. The following species are 



common : 



Phyllograptus angustifolius Hall 

 P. postremus Rued. 



Trigonograptus ensiforinis Hall 

 Cliniaccgraptus imn^ens lined. 

 Djplograptus dentatiis Bcogn. 



These beds represent according to Kuedemann, the third Deep 

 kill zone of the lower Hudson river faunas. 



Cambric strata have been reported from Mt Moreno but they 

 have not been definitely located. Higher up on the northern 

 face of the hill is a quarry in shales with a Xormanskill or middle 

 Trenton graptolite fauna comprising C o e n o g r a p t u s g r a - 

 c i 1 i s Hall, D i d y m ograptus s a g i 1 1 a r i u s Hall, D . 

 tenuis Hall, and other species. 



Burden conglomerate. A calcareous conglomerate in which the 

 pebbles are chiefly limestones cemented by a more or less calca- 

 reous cement is exposed east of Mt Becraft on a small tributary 

 of Claverack creek. Fragments of it are found scattered over 

 Mt Becraft, and it also occurs at the Burden iron mine five miles 

 south of Hudson. Its age is probably lower Champlainic. 



26 General section of the strata of the southern Helderbergs and the 

 cement region of Ulster county, N. Y. 1 p ^ 



Catskill 1725 



White conglomeratic sandstone, forming the summit 

 of Slide mountain. It is a coarse grained heavy 

 bedded moderately bard sandstone containing dis- 

 seminated pebbles of quartz or light colored quart- 

 zite, and streaks of conglomerate. Greatest thick- 

 ness on Slide mountain 350 



1 Darton, X. II. Geology of Ulster County X. Y. X. Y. Slate Geol. 13th An. 



Rep't. 1894. v. L, p. 297 et seg. 

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



Chemung Scries of Centra] and Eastern X. v., pi 2, X. Y. State Geol. 



ITtli An. Rep't and X. Y. State Mas. 5ls1 An. Rep't. 1899. v.2. 

 Van Ingen, <J. and Clark. I'. E. Disturbed Fossiliferous Rocks in the 



Vicinity of Rondout X. Y. X. V. State Paleontol. Rep't 1002. 1003. 



1>. 1 177 et seq. 



