BEEDE: UPPER PERMIAN RED BEDS. 127 



mentioned, as follows : "The fossils from the Double Moun- 

 tain division were collected at several places. The principal 

 localities were Guthrie, in King county, and the falls on Salt 

 Croton, in Kent county. They are both towards the top of 

 the division. The fossils found are species of Medlicottia, 

 Popanoceras, Orthoceras, Pleurophorus , Goniatites, Schizodus, 

 and others which have not been determined. The find- 

 ing of these forms at these localities will certainly establish 

 the Permian age of the beds. The Medlicottia found in the 

 Double Mountain beds is the form described by Doctor White 

 from the Wichita division, and not the Sagerceras described 

 by Gabb from the Triassic of Nevada, The last reason for 

 putting the Double Mountain division in the Permian is, that 

 immediately above, and in unconformable stratification, are 

 beds beyond doubt Triassic." 



In a paper read before the Texas Academy of Science in 

 1897^' Cummins gives a reaume of the detailed work of the 

 latter portion of the Texas survey, which is of so great in- 

 terest that it is necessary to repeat some of it here. As 

 quoted above, he had divided the Permian rocks into three 

 divisions, and the Coal Measures had been divided into five, 

 "for facility in giving particular descriptions of the different 

 beds. It was understood at the time that these divisions were 

 made that they were provisional, and subject to revision when 

 their true relationship to each other might be determined," 

 After discussing the statements made repeatedly in the Texas 

 reports that the Wichita and Albany divisions occupied about 

 the same position stratigraphically, and the statements quoted 

 above, that they might be but different facies of the same 

 formation, he states that ^'by ivalking along the outcrop every 

 foot of the ivay ive luere enabled to note the gradual change in the 

 hthological character of the bedP We were also enabled to note 

 the gradual extinction and change in the fossils as the beds 

 changed in composition. 



"We found that a limestone in the Albany division with an 

 abundant and characteristic Coal Measures fauna gradually 

 changed in composition to a calcareous sandy clay entirely 



21. Texas Permian, June 15, 1897, pp. 93-98. 



22, Italics are mine. 



