Series of shots of team of geologists of the Canadian department of mines and technical surveys, carrying out survey operations in Yukon Territory; FOLLOW SHOT of man in Jeep driving by camera on dirt road (0:15). Various shots of men setting up tents in camp (1:39). Various shots of them building small wharf and inflating raft, one man cast off to fish in narrow strip of open water between shore and thawing ice covering lake (4:18). Good shots of spring break up, sheets of ice slowly collide and break down into small icicles, including shots of men observing (3:13). Shots of ice receding, a Beaver floatplane is visible on some shots (0:39).