STRATIGRAPHIC TAXO>'OMY 64S 



Formations of this age are probably included in the ''Upper Cambrian" 

 and "Ordovician" parts of the House Eange and other sections on the 

 west side of the Eockies between Utah and British Columbia published 

 by Walcott, but I hesitate to point them out. I have, however, more 

 definite information concerning the presence of Ozarkian deposits in the 

 Seward peninsula of Alaska. Here Collier, and subsequently Kindle, in 

 studying the Port Clarence limestone — a formation of great thickness 

 and variety of contents, having early Ozarkian or perhaps late upper 

 Cambrian beds in its lower part, Canadian in the middle, and Eich- 

 mondian deposits at the top — collected Cryptozoon and a brachiopod of 

 the genus Finkelnhurgia that is indistinguishable from one found in the 

 Gasconade formation in Missouri. 



Ozarkian formations in isew York and New Jersey. — The Ozarkian is 

 represented in New York by the Potsdam sandstone, the Theresa passage 

 beds, the Hoyt limestone, and the Little Falls dolomite. The essential 

 parts of the evidence on which the typical Saratogan is removed to this 

 system are given in the preceding discussion of the Cambrian. A fuller 

 discussion of the organic and physical evidence has already been pub- 

 lished in a paper on the Little Falls dolomite and associated formations 

 in New York by Ulrich and Cushing. For details of the stratigraphy 

 the reader is referred to this paper.^^ Concerning the age of the Little 

 Falls, the only additional comment that is of sufficient importance to be 

 inserted here is that the fossiliferous cherts at the top of the formation 

 at Little Falls may prove to be separated from the underlying dolomitic 

 mass by another hiatus. If this could be established I would correlate 

 the dolomite beneath the hiatus with only the lower part of the Copper 

 Eidge division of the Knox and not wdth the whole of that great south- 

 em Appalachian formation as it now appears in the accompanying 

 Eopaleozoic correlation table. 



In New Jersey the Ozarkian is represented by the greater, generally 

 thick-bedded, lower part of the Kittatinny formation. The Ozarkian 

 age of the bulk of this magnesian limestone, with an estimated thickness, 

 according to Ktimmel and Weller, of 2,500 feet or more, is clearlv indi- 



^ Two typographical errors in the paper by these authors (New Yorli State Mus. Bull, 

 140) should be corrected here. On line 10, page 134, a table is mentioned by error as 

 on page 129. The table really referred to is a broader correlation chart that was inad- 

 vertently omitted by the printer. The second is on page 131, where the word thiti in 

 the seventh line from the bottom should read thick. The last sentence of the middle 

 paragraph on page 130 does not express what it was intended to say. It should be 

 modified so that line 8 from the bottom of the page will read : sea is tvell represented 

 only in parts of the southern Appalachian Valley and certainly. — the changed and added 

 words being italicized. 



