KATALLA DISTRICT 

 West of Ragged Mountain 



YAKATAGA DISTRICT 



MALASPINA DISTRICT 

 Western part of Samovar Hills 



EXPLANATION 



Conglomerate 



O - ~--0 



Quaternary unconsolidated deposits 



or >- 



UJ cc 



5 < 



O v- 



u 



. ANGULAR UNCONFORMITY 



Unfossiliferous siltstone, sandstone, and 

 conglomerate; 3500 feet or more; 

 marine and nonmarine(?) 



O ANGULAR UNCONFORMITY!?!: MAY , 

 BE FAULT CONTACT IN PART 



Metasedimentary and metavolcanic rocks of Mesozoic age 



"Conglomeratic" sandy mudstone 



KATALLA DISTRICT 

 East of Ragged Mountain 



Sandstone 



Silts tone or shale 



Coal 



I o o o <^p 9. 

 t, Y A , 



Tuff, volcanic breccia, or 

 tuffaceous sandstone 



Approximate stratigraphic position of 



oil seep, show of oil in well, or 



petroliferous rock 



Approximate stratigraphic position of 

 gas seep or show of gas in well 



Approximate stratigraphic position of 

 petroliferous rock 



Quaternary unconsolidated deposits 



-ANGULAR UNCONFORMITY — 



y.-.xgfgg 



M 



Katalla formation; 8700+ feet; marine 



■CONFORMABLE CONTACT. 



Tokun formation; 2000 feet; marine 



+ 



CONFORMABLE CONTACT 



Kushtaka formation (predominantly 

 nonmarine), Stillwater formation 

 (marine). Stratigraphic relation not 

 definitely establisnea; Stillwater for- 

 mation believed to thin eastward, 

 forming a marine tongue in the coal- 

 bearing Kushtaka formation 



■BASE NOT EXPOSED 



Quaternary unconsolidated deposits; glaciers 



ANGULAR UNCONFORMITY — — — 



= ?>r~r= >T ": 



Yakataga formation; at least 10,000 

 feet, possibly 15,000 feet or more; 

 , marine 





-CONFORMABLE CONTACT' 



Poul Creek formation; 6100 feet; marine 



■ DISCONFORMITYOI • 



Kulthieth formation; 9300+ feet; pre- 

 dominantly nonmarine in outcrop 



-BASE NOT EXPOSED 



| HIGHER BEDS CONCEALED 



GLACIERS 



Yakataga formation (upper part); 

 3000+ feet; marine. Overlaps with 

 angular contact onto Cretaceousf?) 

 Yakutat formation to east, onto lower 

 part of Yakataga formation to west 



ANGULAR UNCONFORMITY 



Kulthieth formation (upper part); 2700 

 feet; nonmarine and marine. Over- 

 laps with angular contact onto Cre- 

 taceous(?) Yalcutat formation to east 



ANGULAR UNCONFORMITY 



Kulthieth formation (lower part); 

 2000+ feet; nonmarine and marine 



BASE NOT EXPOSED - 



In northwestern part of Malaspina district the Kulthieth for- 

 mation is underlain by 3000 feet or more of lower Tertiaryf?) 

 marine siltstone 



LITUYA DISTRICT 

 Topsy Creek to LaPerouse Glacier 



^-^^li^-^i 



HIGHER BEDS CONCEALED BY . 

 GULF OF ALASKA 



"Conglomeratic" sandy mudstone, sand- 

 stone, and siltstone; 9000 - feet; 

 marine 



CONFORMABLE CONTACT . 



Sandstone ana siltstone; 600-1500 feet; 

 marine 



£ DISCONFORMITY 



0-1000 feet; nonmarine(?) 



CONTACT RELATIONSHIP NOT 

 OBSERVED. UNCONFORMITY!?) 



Siltstone; 1200 ± feet; marine 



ANGULAR UNCONFORMITY 



MesoK»c(7) metasedimentary and metavolconic rocks 



Fig. 39.8. Representative stratigraphic sections of the Tertiary sequences exposed 

 Tertiary province. Reproduced from Miller et a/., 1959. 



the Gulf of Alaska. 



