418 Diller and Schuchert — Devonian Rocks in California. 



the road to Callahan's, about thirteen miles southwest of Ga- 

 zelle, and also near Oro Fino in Scott Yalley, fossiliferous lime- 

 stone occurs with Pentacrinus and appears to be Triassic. 



The Devonian limestone four to six miles northeast of Castle 

 Crag, is a veritable coral reef about 60 feet in thickness. It 

 overlies a great mass of dark shales which are apparently older 

 than any of the rocks exposed near Gazelle. This view is sus- 

 tained by Mr. Schnchert who gives paleontological evidence to 

 show that the fossiliferous rocks of Kennet, Hazel and Soda 

 Creeks belong to a lower horizon in the Devonian than those 

 of Gazelle. The slates, overlying the limestones are much less 

 crystalline than near Gazelle and no eruptives were noticed in 

 the immediate vicinity. These rocks, as well as those near 

 Gazelle, were formerly supposed to be Carboniferous.* 



There are two outcrops of Devonian limestone on Hazel 

 Creek about four and five miles respectively east of Southern's. 

 They have a number of fossils in common and probably ex- 

 posed the same limestone. It overlies a large mass of black 

 slate and dips easterly beneath the Carboniferous, which con- 

 tains fossils on Tom Dow's Creek. The strike of the Carbon- 

 iferous at that point is east of north, dipping towards the 

 southeast and probably connects with the well known locality 

 of Grizzly Peak about fourteen miles further to the northeast. 



According to Mr. Storrs, who collected the fossils on Hazel 

 Creek, the dip of the limestone is easterly and overlies a great 

 mass of black slate. Its strike is a little east of north, con- 

 necting it directly with that of the same horizon on Soda 

 Creek as well as that near Kennet further southward. 



Three miles west of Kennet, a mile beyond Mr. Matson's 

 lime kiln at a locality discovered by Mr. Fairbanks,f the lime- 

 stone in places is composed almost wholly of branching corals 

 and is in reality a coral reef about 50 feet in thickness. It is 

 much warped but generally dips to the eastward beneath the 

 Carboniferous which occurs along the McCloud River. 



The region directly westward of the great bend of Pitt 

 River has yielded many fossils belonging to the Jurassic, Tri- 

 assic, Carboniferous and Devonian systems. All of which are 

 arranged in successive belts increasing in age westward in the 

 Klamath Mountains, indicating the presence of rocks of still 

 greater age about the central portion of that mass. The gen- 

 eral strike of the Devonian rocks from near Kennet is about 

 north 18° east, which is in line with the outcrop of Hazel 

 Creek and Soda Creek, over thirty miles away. If they are 

 really continuous for this distance as appears probable it sug- 

 gests as previously urged by the writer that the axis of folding 

 joins the Klamath Mountains to the Coast Range rather than 

 to the Sierra Nevada. J. s. D. 



*U. S. Geological Survey, Bull. 33, p. 11. 



f Eleventh report of the State Mineralogist of Calif., p. 48. 



