BULL. GEOL. SOC. AM. 



VOL. 21, 1909, PL, 36 



^^ -WM^^^^^I^ 







Figure 1.- 



-CONGLOMERATE OF QuARTZITE PEBBLES AT THE Ba.SE OF THE CAJ^IBRIAN QUARTZITE IN 



Big Cottonwood Canyon 



Figure 2. — Cambrian Quartzite resting on Archean Gneiss and overlain by Cambrian 

 Shale and Limestone at Willard. The Sequence here is Unbroken 



EXPOSURES OF QUARTZITE PEBBLES AND CAMBRIAN QUARTZITE 



