Picture of small dust storm.

Small dust storm blowing across highway near Othello, Washington. I read that the Palouse Hills were formed by dramatic events in geology. During ice ages, big ice dams blocked the columbia river. They backed up lakes into the valleys of what is now western Montana. Geologists refer to a giant "Lake Missoula." Next	Every once in a while, as the ice melted, the dam would break letting go a horrendous flood often called the Great Spokane Floods. Water would have problems getting through a bottleneck now called Wallula Gap so it would form a temporary lake and deposit silt west of the Palouse. As that lake dried, the silt would blow forming sand dune like hills.
My NW bicycle tour 2002	Next