. Brigham Young University science bulletin. Biology -- Periodicals. 18 Bhigham Young University Science Bulletin. Fig. 16. Northeast .spur of Niven Peak at 56°56' N; 126°52' W, as s, , n I mm tin- east. Tlir three low .shaped ridges along the spur near the eenter of tlie photograph are held up by fossihferous hmestone at the top of tlie Caehe Creek set|uence and are at an elevation of approximately 7000 feet, 20(M) feet above the valley floor. The general level spur toward the left is held up by graywaeke sandstone at the base of the Triassie Takia sequence. The ragged ledge-formin
. Brigham Young University science bulletin. Biology -- Periodicals. 18 Bhigham Young University Science Bulletin. Fig. 16. Northeast .spur of Niven Peak at 56°56' N; 126°52' W, as s, , n I mm tin- east. Tlir three low .shaped ridges along the spur near the eenter of tlie photograph are held up by fossihferous hmestone at the top of tlie Caehe Creek set|uence and are at an elevation of approximately 7000 feet, 20(M) feet above the valley floor. The general level spur toward the left is held up by graywaeke sandstone at the base of the Triassie Takia sequence. The ragged ledge-forming exposures in the center and right are on tlie upper part of the volcanic Asitka seciuence near Locality The steep, apparentis barren, slopes in center background are clothed with grassy alpine tundra dominated by Festuca altaica. near south end, in mixed lodgepole pine, white spnice, alpine fir woodland, at .56°48' N; 127° 12' W, at 3625 feet elevation, on morainic gravels. 27. Thutade Mt. On mountain behind camp at Thutade Lake, at 56°49' N; 127°11' \V, at .5000-6000 feet elevation, in alpine tundra and steep grassy slopes, on Bowser Formation. 28. .South Pass Peak. Ca L5 miles northwest of South Pass Peak, ca 7 miles south-southwest of "Thutade Village," at ,56°42' N; 127°0y' \V, at 4300 feel elevation, in open woods, on alhi\ium. 29. Coal beds. In saddle of niovuitains. ca .5 miles southeast of south end of Thutade Lake, at 56°45' N; 127°05' W, at ca 5000 feet elevation, in alpine tundra and barrens on Tertiary Sustut coal beds. 30. Mt. Jorgensen. On Mt. [orgensen. ca 12 miles northeast of •Thutade Village," at 5e°54' N; 126° 56' W, at .5200 feet elevation, in alpine tundra on Sustut Formation. 31. Firesteel Kiver. Ca 7 miles east of Kitchener Lake, at 57°03' N; 127°10' W, 4000 feet elevation, in Boreal Forest on alluvium. 32. Niven Creek. Tributary of Ni\en Creek, ca 3 miles east-southeast of Dewar Peak, at 56°42' N: 126°52' W, at 450
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