NATURAL FEATURES

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Across
  1. 1. a deep, narrow valley surrounded by tall cliffs
  2. 2. a slowly moving mass or river of ice formed by the accumulation and compaction of snow on mountains or near the poles.
  3. 4. extending far down from the top or surface.
  4. 6. a cascade of water falling from a height, formed when a river or stream flows over a precipice or steep incline.
Down
  1. 1. is an underwater ecosystem characterized by reef-building corals
  2. 3. a large natural stream of water flowing in a channel to the sea, a lake, or another such stream.
  3. 5. a large body of water surrounded by land
  4. 7. the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underlying the soil or oceans.