Fossils from Pinnade Pass. 171 



has its source. Two quartz pebbles from the conglomerate of 

 Pinnacle pass are shown in the accompanying illustrations. The 

 larger jjebble (shown in figure 7) is of bluish-gray quartz, and 

 the smaller one (depicted in figure 8) is of white quartz. The 

 fragments into which they have been broken are now firmly 

 united. The engravings are photo-mechanical (Moss process) 

 reproductions from the objects. 



In the northern and western part of the Samovar hills the 

 rocks of the Pinnacle system again apj^ear, forming a bold angu- 

 lar ridge, curving southward and reaching the border of the 

 Agassiz glacier. The southern face of this range is precipitous 

 and, like the Pinnacle pass clifis, exhibits the edges of northward- 

 cli]Dping strata. Its northern and western slopes are heavily snow- 

 bound. It is in reality a continuation of the Pinnacle pass fault, 

 but thrown out of line by the cross-fault which marked out the 

 course of the Seward glacier. 



Figure 7 — Faulted Pebble from Pinnacle Pass. 



The Yakutat and Pinnacle systems are so easily recognized 

 that their distribution can be distinguished at a glance, when 

 the outcrops are not concealed beneath the nearly universal 

 covering of snow. The rocks of the Yakutat series are heavily 

 bedded sandstones and shales, and have in general a light-brown 

 tint ; while the rocks of the Pinnacle series are thinly bedded 

 and dark in color, appearing black at a distance. 



The presence of a Pecten (P. caurinus (?) Gld.) in the limestone 

 of the Pinnacle series has already been mentioned. Other fossils 

 were obtained from sandstones and shales at the crest of the 

 cliffs above Pinnacle pass at an elevation of 5,000 feet. These 



