SCIENCE
(4) K-3 Photographs by Michael Collier. In this description of how a canyon is formed, a free verse poem and full-page color photos of the Colorado River and its tributaries provide a lyrical account of erosion. The verse is occasionally awkward ("and with mallets of masses of pebbles / and with sandy razors of silt / it carves out the stone"), yet it and the exquisitely clear, often aerial photos manage to convey the grandeur of geological processes.

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