WEBEE caSok 389 



This is overlaid by about 75 feet of yellowish, brittle limestone, then 100 

 feet of light-colored, thinly-bedded limestone, and 100 feet of dark siliceous 

 limestone, of which the following analysis was obtained : 



Silica 59.753 



Alumina 8.595 



Ferric oxide. - . 1.717 



Lime 13.231 



Magnesia 2.885 



Phosphoric acid 0.741 



Carbonic acid 11.114 



Water and organic matter 1.379 



99.415 

 Up to this horizon, in round numbers 1,600 to 1,700 feet above the 

 quartzite, all the fossils which were found have belonged to the Coal-Meas- 

 ures. They are very few, but sufficient to determine the age. Above this, 

 and up to the red Triassic sandstones, a thickness of about 700 feet, the 

 fossils are all Permo-Carboniferous, and are found at three localities. The 

 following have been determined : 



Aviculo;pecten McCoyi. 



Aviculopeden occidaneus. 



Aviculopeden, ? new sp. 



ScJmodus ovata. 



Myacites (Pleuromya) Weberensis. 

 Together with a Discina, which was found near the base of the series, and 

 which has been figured by Professor Meek as of Triassic age. 



Above the siliceous limestones are about 100 feet of chocolate and olive 

 shales, carrying beds of argillaceous sandstones 3 and 4 feet thick, which 

 also show beautiful ripple-marks, but much larger than those described 

 below; then some 200 feet of mud-shales, containing limy bands with 

 ripple-marks, and argillaceous limestones. Above these are 250 feet of buff 

 and gray sandstones, with mud-shales, and over these a thin siliceous series, 

 almost a quartzite, of about 70 or 80 feet in thickness. The dip through 

 these Permo-Carboniferous shales has varied from 48° to 60°, in some cases 

 being as high as 70°. 



