440 



DILLER AND STANTON THE SHASTA-CHICO SERIES. 



Feet. 



10,500 

 11,000 

 11,500 



12,000 

 12,500 

 13,000 

 13,500 

 14,000 

 14,500 

 15,000 

 15,500 

 16,000 

 16,500 



17,000 

 17,500 

 18,000 

 18,500 

 19,000 

 19,500 

 20,000 

 20,500 

 21,000 

 ^ 21,500 

 "^ ^ 22,000 



XI 



o 



22,500 

 23,000 

 23,500 

 24,000 

 24,500 



25,000 

 25,500 

 26,000 

 26,500 

 27,000 

 27,500 

 28,000 



28,500 

 29,000 

 29,500 



30,000 



Eocks. 



Shales 



tAvisted and 



veined. 



Shales 



with 



Calcareous 



layers. 



Shales 



with 



Calcareous 



layers 



in places 



much 



folded. 



Shales and 

 shaly 



sandstones 

 with 



Calcareous 

 layers. 



Shales and 

 shaly 



sandstones 

 with 



small sand- 

 stones 

 . increasing. 



Shales 



and thin 



sandstones. 



Serpentine 

 (Peridotite). 



Fossils. 



f Belemn'ites iinpn'ssus. 

 \Amriwnites [Besmoceras) sp. 



Belemnites unpressus. 

 Ammonites {Lytoceras) hatesi. 



Ferns and other plants. 

 (Locality d.) 



Aucella piocJii. 



In the Knoxville beds shales predominate, although there are a large 

 number of thin sandstones interstratified with the shales. The great 

 majority of these sandstones are less than a foot in thickness, and they 

 rarely, if ever, attain ten feet along the north fork of Elder creek. Sand- 



