Handbook of Paleontology 233 



of animals indicate a warm and uniform climate over 

 most of the earth. The greater abundance of life and 

 the very thick limestone deposits of the middle and 

 later epochs are evidence that there was a mild and 

 fairly uniform climate over the entire world during the 

 whole period. This is true also for the Ozarkian 

 period with its 8000 feet of deposits almost entirely 

 limestones and dolomites. 



New York formations. The Upper Cambrian is not 

 represented at all in New York State and the Middle 

 Cambrian has but little representation. The forma- 

 tions of the Saratogan group are now known to repre- 

 sent the Lower Ozarkian. The Wappinger terrane in 

 southeastern New York will be treated separately, 

 after the discussion of the other formations, since it 

 consists of several members containing faunas of 

 Lower Cambrian, Ozarkian, Canadian and Ordovician 

 ages. The formations of the Cambrian and Ozarkian 

 are classified as follows : 



f Little Falls dolomite 



,~ , . <-, , m Hoyt limestone (basal phase of Little 



Ozarkian System \ * FaUs) 



(. owei ; j Theresa formation ; passage beds 



[ Potsdam sandstone 



\ Middle (Stissing limestone 



Cambrian System -j j Georgia beds 



Lower 



(Poughquag quartzite 



The Poughquag quartzite (quartzite and conglomer- 

 ate) occurring in southeastern New York, received its 

 name from exposures at Poughquag (Dana '72) in 

 southern Dutchess county. It rests unconformably 

 upon the Precambrian rocks below and, as is com- 

 monly the case with the first sediments overlying the 

 Precambrian basement, it is a pure quartz rock 



