SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 75. NO. 5. PL. 



South face of Section Mountain, uii north side of Clearwater Canyon. It is ca|iped hy Middle Devonian limestone (P), resting cm the suhjicent Sarbach formation (5), which extends down to the subjacent Mons formation (A/). Tlie latter continues down the gentle 

 slope on the right to the long horizontal cliff line formed by the massive limestones of the Lyell formation (L). 



Locality. — At H on map. plate 26. Head of Clearwater River Canyon about JO to 21 miles (3J.J to 33.8 km.) north of Lake Louise Station, Alberta. 



