1.   A dry stream bed twisted through thick tree roots.

2.   A formal tank would perhaps owe as much to landscape gardening as to an idealised stream bed.

3.   Now, the focus is shifting to washes, the dry stream beds that carry water only after a heavy rain.

4.   The stream bed below is normally dry as the water percolates through at a lower level.

5.   They ram sticks upright into the stream bed.

6.   We turned left and followed the gravel stream bed.

7.   A dry stream bed intersects the trail in several places.

8.   And stay away from the steaming vents on either side of the stream bed.

9.   And stream beds may be ravaged by gouging in the spring, when the ice finally begins to melt and grind its way downstream.

10.   As are the petroglyphs, dozens of them, clustered on flat sides of boulders above a dry stream bed at the mouth of the canyon.