A: Sena G ad e Ming: , he” vt ‘Ss Yee. by hunthog pear Ay athe fhe Cle , f 7) Fer let eGo the cast limb of a syncline the west limb of which may be seen north of mile posts 97 and 98, where Triassic shales and dark sandy limestones dip easterly at angles of from 13 to 48 degrees. The structure is locally COnsuEeG by Bele as indicated by vertica] and reversed dips. The belt of low rounded hills between the Triassic outcrops at mile 98 and the front of the Rocky Mountains near mile 101 is underlain by black shale, with a general northeasterly dip of 40 to 50 degrees. Crumpling occurs locally, accompanied by reversed dips. The shale is soft in general, but contains some hard chert and quartzose beds. No fossils have been found at this locality, but the shale is probably a lower division of the Triassic sedimentary succession. The Rocky Mountains The front of the Rocky Mountains is sharply defined about one- third mile cast of mile post 101. Here, on the upper waters of Tetsa River, grey limestone is faultod against black shale of the Triassic belt just described. The fault strikes west 25 degrees north and dips 75 degrees southwest. The adjoining limestone exhibits a sharply over- turned anticlinal structure that is evidently a part of the major an- ticline that forms the front of the Rocky Mountains for many miles north and south of the Highway. To the north, the axis direction is about 19 degrees west of north, and to the south 23 degrees east of south. As seen from mountain peaks the line between the limestone mountains and the shale foothills is straight and clearly defined for miles to the north- west and southeast. The major overthrust of the mountains has defined _ the mountain front, but a subsidiary faulted anticline trends obliquely to the strike of the.main folding and so extends out into the Foothills, where it eee traced for several “miles. to the southeast. ~The Ae ont. range. of the Rocky Mounteins — extends tere for cy miles (to mile 110) asi traversed by the Highway. The summit lies be- tween two summit lakes. at an elevation of about 4,100 feet above sea- level. The slope on the Highway to the east is gentlé, but the switch back between miles 106 and 107, on the west slope, is so steep that a cut 1 mile long has been made in the mountain side between: ee 2105.5 and 106.5 to give a better grade. ‘the grey limestone mountains of the pass are similar in appearance to those at Jasper, but the valley itself is much narrower. Peaks to the north and south rise to heights of°about 7,000 feet. A main peak to the north is named "St. Paul" on the map and its companion on the south "St. George". Other peaks are mameless. About 15 to 20 miles south by east from the Highway, a group of peaks rises to con- spicuous heights, and one/of the mountains supports a hanging glacier. This is the highest group seon in the front'range, some of the peaks probably rising to 9,000 fect above sea-level. Along.the pass the peaks have rounded crests and are joined by long, gentle ridges. A peak south of mile 105 has conspicuous cirques on its west and north sides, and a terminal moraine occurs where the west facing glacier’ joined the ice- eeu noam feeding north into Me Creek Valleys Pronounced terraces of glacial till flank the sides of the pass to an elevation of about 700 feet above Summit Iake. These terraces may be traced for some miles to the east along Tetsa River and for some 20 miles to the northwest down MacDonald Creek. North of Summit lake, local erosion has left well-developed "hoodoos" of till standing on the mountain Side. Similar terraces occur along Muncho Iake and up a side valley hoodoos are present, and others are being formed. J