DEVONIAN. 289 



of several localities, the intimate association of the limestone with more or less 

 vesicular igneous rocks that break through it, inclose it, and form the greater mass 

 of the material is repeatedly mentioned. The fossils from one locality (near White 

 Rock) we're determined by Schuchert as Upper Devonian, those obtained at six 

 other localities as Middle Devonian. 



Concerning the northeastern belt Diller ^^^ states : 



The northeastern, belt of Devonian limestones and shales lies chiefly in the Sacramento 

 drainage, extending northward into the Klamath and Rogue River region. The southern 

 part, lying 'within the Redding quadrangle, and as far north as Gazelle, has already received 

 much attention. The principal limestone bodies rich in fossils occur near Klamath and on 

 Hazel Creek. Smaller masses outcrop near Horsetown and at a number of points 6, 8, and 

 11 miles northeast of Redding, where they lie close to the Carboniferous in line with a larger 

 mass 2 nules northwest of Baird. 



One of the best sections of these rocks, but not including the whole Devonian series, may 

 be obtained on Backbone Creek 3^ miles north of Kennett, where nearly 900 feet of sediments 

 are quite fully exposed. 



[Top.] Feet. 



1. Conglomerate; many quartz pebbles and numerous holes from dissolved limestone frag- 



ments, some of which contain fossils like those of the limestones below. Unconformable 



on 2. Possibly Carboniferous 30 



2. Shales, mostly dark, with some thin sandy beds 140 



3. Limestone, rather massive, light colored; little chert but full of corals, etc. (locality 6242). . 100 



4. Thin-bedded sandstones and shales which are cherty and gray below. Near middle part 



is limestone lens 10 to 15 feet thick 300 



5. Limestone, thin bedded and crowded with massive, branching, and cup corals (6244). 



Cherty nodules and bands in bluish limestone becoming whitish and without chert below 250 



6. Siliceous shales; 10 feet of banded chert at top, with sandy shales, black shale, and fine 



shaly sandstone, very tiiin bedded, resting on the igneous rocks below 75 



A large number of fossils were collected from the Devonian of the Redding quadrangle, 

 and these may in large part be referred to the section given, although but few of the fossils 

 were actually collected at the point where the section was measured. After enumerating a 

 number of the species found at various localities, Mr. Schuchert concludes as followsi: 



"The section of locality 6242 given me by Mr. DiUer, the thickness of which he estimates 

 to be about 900 feet, has one general fauna indicative of the Middle Devonian. The general age 

 has been known for some years, but the collections of 1902 have given us a definite section 

 and also species that are known to occur in other American locaHties. This is especially true 

 of the fossils of the lower shale zone, which repeats the fauna of the Eureka and White Pine 

 districts of Nevada and the Middle Devonian of Iowa. The species that are common to at 

 least two of these regions are ScMzophoria striatula, StropTieodonta canace, Gypidula lotis, Pugnax 

 alius, Atrypa missouriensis, and Cyrtina missouriensis V 



Taking these species in connection with the corals of the limestones, as Heliolites porosa, 

 EndophyUum or SpongophyUum, and Phillipsastrsea, one sees plainly that the California 

 Middle Devonian belongs to the "Euro- Asiatic province." This province extends east in 

 North America as far as central Missouri, eastern Iowa, Milwaukee, Wis., and Petosky, Mich. 

 East of these places occur the Middle Devonian faunas of the "North American type." 



These Devonian strata are described as the Kennett formation, their stratig- 

 raphy, details of occurrence, and paleontology are presented, and their conformable 

 relations to older volcanic rocks are stated in the Redding folio."' 



48011°— 12 19 



