624 REPORT UNITED STATES GEOLOGICAL SURVEY. 



This general section, as I have already indicated, has been compiled 

 from the detailed sections given in preceding portions of the report. The 

 numbers of these sections are given in the right-hand column of the 

 table. 



Section No. 11, in John Day's Valley, begins, just at the top of the "Bed 

 Beds." Of the latter the best section was made at Station 55. (Section 

 No. 10.) 



The section of Station No. 60 (Section No. 19) is the section of the Meek- 

 oceras Beds, and I am of the opinion that it lies immediately below the 

 Bed Beds. In descending the ridge leading southwest from Station 60, 

 the last dips seen are towards the southwest, but the timber soon be- 

 comes dense and obscures the outcrops. After passing through the timber 

 and coming out in the Blackfoot Valley, red saudstones, in all respects 

 like those in John Day's Valley and the Salt Biver Bange, are noted with 

 a northeastern dip. It is evident, therefore, that the timber covers a 

 synclinal axis, and the red sandstones probably outcrop with a south- 

 west dip somewhere between Station GO and the northeasterly dipping 

 outcrop on the Blackfoot. 



Again, in the Salt Biver Bange below the red sandstones is a series 

 of grayish calcareous and arenaceous beds, resembling those of section 

 No. 19 at Station GO. These beds also contain Aviculopecten pealei and 

 Gervillia 7 which occur in section No. 19. 



The beds therefore appear to be lithologically and palaeontologically 

 identical, and also occupy the same position strati graphically, and I have 

 no hesitation in connecting the sections as I have done in the general 

 section. 



The limestones, called the " Bentacrinus Beds," were so named because 

 Pentacrinus asteriscus appeared to be a characteristic fossil of the beds 

 wherever they were seen. . 



The only fossils from the " Belemnites Beds " were obtained in John 

 Day's Valley, and this name was given provisionally, although it is prob- 

 able that Belemnites clensus will be found to range down through the 

 section in other localities, when a more careful investigation shall be 

 made. 



The name "Bed Beds" has been retained for the red sandstones be- 

 cause they are supposed to be equivalent to the " Bed Beds " of the East- 

 ern Bocky Mountain region in Colorado and adjacent regions. 



Organic contents. 



The fossils from No. 1 of the section have been described by Brofessor 

 White in Bulletin of the Survey , Vol. V, No. 1, pp. 105-117. ' The list is 

 as follows : 



Meelcoceras gracilitatis. 

 Mcekoceras mushbachanus. 

 Meelcoceras aplanatum. 

 Arcestes f cirratus. 

 Arcestes f two species. 

 Terebratula semisimplex. 

 Terebratula augusta. 

 Avicu lopecten idahoensis. 

 Aviculopecten pealei. 

 Aviculopecten altus. 

 Mumicrotis curta. 



