Fig. 22a


Mt. Adam, north side (looking south). Note parallel rows of tree tops running from left to right along lower half of slope (arrows) as possible evidence of remnant steps or benches that may have once existed to the top of the mountain. The lower steps may have been preserved from ice sheet damage when covered by advancing glacial drift and/or water. Most of the steps higher up on the north side, however, were destroyed by the ice sheet. Picture taken 7 August 1994 from Black Walnut Island.

Fig. 22b


Mt. Adam, southwest side (looking northeast). Note possible traces of steps preserved near the top of the mountain and along a lower bench (arrows) and the non-horizontal structure of the granite. Unlike the north side, which received the brunt of impacts from ice sheets, steps on the southwest side may have survived by being down-flow and in an ice "shadow." Less chemical weathering and water runoff at the top of the mountain may explain why those steps are preserved better than the ones lower down on the slope. Picture taken in March 1994.

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