Diller — Mesozoic Sediments of Southwestern Oregon. 421 



In the Dothan formation sandstone predominates though 

 there is much interbedded shale. Its Jurassic age is indicated 

 by the presence of Aucella erringtoni. 



Both formations where best developed dip to the southeast 

 and the Galice beds overlie the Dothan. They are generally 

 separated by a belt of volcanics. Both series and the asso- 

 ciated volcanics are locally sheared by thrust from the south- 

 east. 



The prevalence of shearing from the direction of the dip 

 suggests that the strata are overturned and that the Galice is 

 really older than the Dothan. 



From its lithology and fauna the Galice may be correlated 

 to the Mariposa. 



The Dothan lies unconformably beneath the Knoxville and 

 with its occasional beds of chart may be the equivalent in 

 part of the Franciscan in California, which is said to occupy 

 a corresponding position. If so, the Franciscan is Jurassic. 



The Dillard of the type area of Louderback is characterized 

 in large part by the presence of Knoxville fossils and there- 

 fore belongs chiefly if not wholly to the Myrtle formation. 



