 |  | LS.0051-00 The headwaters of the Noatak River. Gates of the Arctic National Park, Alaska. | |
|  | | LS.0052-00 Paleozoic sandstone crops out above the Headwaters of the Noatak River. Iyahuna, Angayu and Tupik Creeks are in the middle of the picture. Mt. Igikpak is just barely visible on the right edge. Gates of the Arctic National Park, Brooks Range, Alaska. | |
|  | | LS.0053-00 Fall colors reveal patterns in vegetation & geomorphology along upper Noatak River. Green areas are willows growing in gravels along current and paleo creek channels. The bright yellows are sedges growing in poorly drained clays, probably underlain by permafrost. The brown areas are grasses, growing in drier bottom areas. Brooks Range, Alaska. | |
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