Haystack boulders - Massive erratics rafted by icebergs from outburst of Glacial Lake Missoula ice dam collapse.
Haystack boulders - Massive erratics rafted by icebergs from outburst of Glacial Lake Missoula ice dam collapse.
Dry Falls! Dry Falls... the site of on of the most rapid and cataclysmic floods recorded by geology. This mega flood was caused by the rupture of a glacial dam…