21)8 .\i:w ^(iKK s'lAii: .ml\<i:u.m 



Feet Total 



M<tn litis linirstinic 4()-ll() 



l)aik blue lliiu Ix'ddcd liiiK*sit)iu' wIulIi bix'aks 

 into almost irgular blocks. The fossils are: 



1 Tentaciilites gyracaiitlnis {Ealoii) Hall aa 



'2 SpirilVr vaniixeini Hall a 



;> Siroi)lRH)d(Hita (lU-acliypi-ion) varistriata (^Coii.) 11. r 



4 Moirambonia avkuloiilea 11. (.V) c 



5 Loporditia alta {Con.) II. c 



C'liaetetes (Moiiotryi)ella) arbusculus //. c 



Covered by soil 20-20 



25 Summary of the stratigraphy of Becraft mountain and vicinity 



near Hudson N. Y.i 



Jn siriicnire lUHTiilt mountain is a syncliuorium, 

 the axes of which pitch southward except near 

 the southern end where they rise again, through 

 faulting, thus forming a basin structure. 

 Along the eastern side the dip of the strata 

 averages about 12 degrees into the mountain, 

 but the western side shows a number of 

 asymmetric anticlinal folds with steep, often 

 overturned western limbs. The structure is 

 furthermore complicated by a number of faults 

 of which 21 have been definitely located. Sev- 

 eral of these faults present interesting over- 

 thrust features while repetition of the strata 

 is of common occurrence. The following forma- 

 tions occur: 



Feet Total 



Onojulaga limestone 20-25 



This is found only in a synclinal trough forming 

 the high ground in the southeastern part of the 

 mountain. It is a dark gray, finely crystalline 

 lime sandrock, rare in fossils. Those recorded 

 arc: 



Ch(>n()i)hylluni 8i)irifer varicosus 



Favositcs Atrypa reticidaris 



Stroma to] lora Loi)taona rlioniboidalis 



Zai)l)rciitis .s7>. Oi-(hotliotcs pandora 



Odoiil(!(('i;lialns solenurus Euompbalus sp. 

 Sijirifcr i-aricosta 



This is tlie highest formation of liecrafl moun- 

 tain. 



'Orahaii, A. W. Stratigraphy of Bcx'raft Mountain, Columbia Co., N. Y. 

 X. Y. State Pah'ontol. Kep't. 1003. p. 1030-70. 



