262 BROOKS AND KINDLE PALEOZOIC KOCKS OF UPPER YUKON 



Provisional stratigraphic Table 



System. 



Quaternary. 



Tertiary. 



Cretaceous. 



Carboniferous. 



Carboniferous. 



Series. 



Recent. 



Pleistocene. 



Eocene 



(Kenai). 



Upper 



Cretaceous. 



Lower Creta- 

 ceous or 

 Upper Ju- 

 rassic. 



Triassic . 



Upper Car- 

 boniferous. 



Lower Car- 

 boniferous. 



Upper 



Devonian. 



Lithologic character. 



Silts, sands, and gravels . . . 



(Unconformity.) 



Chiefly silts, Avith some 

 gravels. (Invertebrate 

 fossils, fossil plants.) 



( Unconformity. ) 



Friable conglomerates and 

 sandstones a n d shales 

 with lignitic coals. (Fos- 

 sil plants. ) 



(Unconfonnity. ) 



Conglomerates, sandstone, 

 slate, and shale, cut by 

 granite. (Invertebrate 

 fossils. ) 



(Unconformity.) 



Siliceous slate and quartz- 

 ites, with some tufit and 

 a little limestone, cut by 

 basic dikes. (Inverte- 

 brate fossils. ) 



(Unconformity. ) 



Limestones and slates. 



vertebrate fossils.) 

 (Conformity?) 



(In- 



Heavy limestones. (In- 

 vertebrate fossils. ) 



(Unconformity ? ) 



^N'ation river formation. 

 Conglomerates, s a n d- 

 stones, and shales. 

 (Plant fragments. ) 



(Unconformity. ) 



Calico Bluff formation . 

 Thin-bedded limestone, 

 slates, and shales. Some 

 igneous rocks. (Inver- 

 tebrate fossils.) 



(Conformity.) 



Black and gray shales and 

 slates. (A few inverte- 

 brate fossils. ) 



Locality. 



Throughout the prov- 

 ince. 



Throughout the prov- 

 ince. 



Along Yukon and 

 adjacent area. 



Wolverine mountains, 

 Quail creek, near 

 Eampart. 



Upper Yukon river, 

 between Fourth of 

 Jtdy and Coal creek. 



Yukon river, near 

 mouth of Nation 

 river. Upper White 

 River valley, Stew- 

 art River basin. 



Yukon river, near 

 mouth of X a t i o n 

 river, Upper AVliite 

 River valley. 



Yukon river, at mouth 

 of Nation river. 



Calico bluff and other 

 points on Upper Yu- 

 kon river ; also on 

 Porcupine river. 



Calico bluff, on Yukon 

 and on Porcupine. 



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