Correlation of the TriasHc Rocks in ■ 



l 





Nitina Valley. 



Kot-lnaand 



White River. 



Cooper PasE. 



Upper Susltna Valley. 



EennlPenln- 



West coast of Cook 



lliamaaLake. 



Alaska Penin- 



Kodiak Island 



Herring Bay, 

 Admiralty 



Hamilton Bay, 

 Kupreanof Inland. 



Gravina Island. 



Y °»rr 



Firth River 



Canning River. 



Noatak Valley. 



Cape Lisburne. 



Cape Thompson. 



Lnw'r'enoe Brook. Mouotaln, 

 Island? Seward Peninaula. 





■ 



McCarthy forma. 

 Him (-hale and 



l,l«ru u.) rhick- 



Conformity? 



McCarthy for- 



n..i...n(i.1,iek 



8 'riinr"to..'el). in 



..nVAs. tuffs, and brec- 

 cia-* With l'-l: :■■ 



inonoiis. Shale* 



lis. ' Underlain no- 

 conformably by P«-r- 



Thin-bedded lime- 



Slate, tuff, arkose, and 

 calcareous beds with 



feet. 



jimestones with 



| 



Calcareous shale 

 and some chert. 



laris. Thickness, 





Thickness,700+ 







t'licrtvlimepionewith 

 r-t-i.doinoiioiissub- 

 cir.-uinris. Basal 

 conglomerate. 



Unconformity ? 





Calcareous shale 

 and sl.aly lime- 

 stone with P-eu- 



Conformity ? 



Limestones 



Vukku.'s" 

 .in.l relatione 



Float with Pseudo- 

 laris. Derivation 



Float of cherty 



Paeudomonoiis 



Derivation not 

 known. 



Shales, cherts, and 



feet. Probably un- 



deiliiiti by Cnrln.ui- 



Cherts and limestones 



.~i]l..'i l ri 1 ;;l 1 V'; i-j'. M 

 Underlain by Car- 

 boniferous? lime- 



Float with 

 P*eudumo- 













Contorted 

 cherts, Thick* 



with no fossils. 

 Thickueas,l ( Ouu? 





Contorted 

 cherts, with no 

 fossils Thick- 



Contorted 



cherts with no 



fossils. 

 Thickness Dot 



known. 



Cherts and 

 shales with no 



tiuD doubtful. 





| 



Shales with Halo- 

 bia cf. superba. 



corals. (Posi- 

 tion and rela- 

 tions uncertain). 

 Probably under- 

 lain by Uevo- 





















\ 















Limestone with Halo- 



hju. Thiuknexsand 



Limestone with cor- 

 ah. Thickness 





























% 



Niiioa limestone 

 (thin-bedded 



Thinly bedded 









































* 



ChitiHtone lime- 



tarns Halobia 

 cf. superba, Tro- 



Thick new, 1,800 

 Conform Ity 1 







Limestone with Halo- 



Thicttness ' a few 

 hundred feet. 













Limestone 

 with Halobia 

 cf, superba, 

 Juvavites, Ar- 



Thickness.^a 

 feet. Basal 



Cherry limestone with 

 Halobia cf superba 

 etc. Relation to 

 i'^onltes-bearlng 

 beds not known. 





Limestones and 

 shales with Halo- 

 blacf. superba and 

 CHonites ? Basal 

 limestone bed 

 with manybrachl- 



and Trachyceras 

 cf. leconti. Thick- 

 ness, 300 + feet. 

 Underlain by Per- 

 mian (T) limestone. 



Flaggy 



limestone 

 with Halobia 



Underlain by 



Fermlan (?) 

 limestone. 



lobia cf. BUperba. 

 Llmesione and 

 some shale with Ha- 

 lobia cf. superba, 

 brsnliiopods as at 

 Nation River, Ger- 

 villia, Megalodon 1 

 and Cllonlten? 



Calcareous sandstone 

 without character- 

 istic fossils. 



Underlain by Per- 

 mian (?) limestone. 















stoned "("»«"»« 

 Conformity ? 



























Limestone float with 

 BulriferlnaborealisT 

 and Dawsonltesoan- 

 adense T 























11 











































Slates with Ceratltes 

 (Gymnotoceras)and 

 Daonella. Thfck* 

 nesa and relations 





li 



Nikolai preen. 

 stone (basalt 



not exposed. 



Nikolai j-reen- 

 stone. (Itwrnlt 



Underlain' by' 



CarlioniferoUB 



beds. 







Basic lavas and tuffs, 



Pro'halilv underlain 

 by Carboniferous (?; 



Ellipsoidal lavas 



Underlain by 

 Hate and >-r«y- 



1 known age. 



Greenstone. Thick- 



Probably underlain 

 by slate. 



Greenstone} 



Greenstono. 



Ellipsoidal 

 lava-. Thick- 

 ness unknown. 

 Probably un- 

 derlain by slate 





Ellipsoidal lavas 

 (Kelaliona to Law- 

 Bonltes-bearingbeds 



Underlain by Permi- 

 an (?) limestone. 





















