332 PAIGE AND KNOPF — STRATIGRAPHIC SUCCESSION IN ALASKA 



Feet 

 Upper Jurassic to Upper Middle Jurassic. — Sandstones, shales, con- 

 glomerates, tuffs, and arkose 2,000 ± 



Unconformity. 

 Lower Middle Jurassic. — Meta-andesites and pyroclastics, grayvvackes, 



sandstones^ shales, and conglomerates 2,000 i 



Unconformity (?) 

 Upper Paleozoic (?)- — Slates and graywacke-slates. 



Unconformity ( ?) 

 Pre-Silurian (?) — Garnetiferous mica-schists and chloritic albite-zoisite schists. 

 Intrusive quartz-diorites. — Intrusive into Lower Middle Jurassic rocks. 



