The Rockies Mountains of northwestern America are already the third mountains range in this region. The first mountain chain developed 1,6 billion years ago. The second phase marks the uplift of the Laramic mountains during the Jurassic age. Today's alpine-like Rockies are a mountain rage caused by plate collision including a faulting systems with nappes. The geological processes of west coast America are responsible for this development. Here the pacific ocean plate subduces beneath the American continent. A large number of lakes in British Columbia are tarns. These glacial cirque lakes are contemporary witnesses of the last ice age.
Pentax MZ-5, Pentax 28mm, f/22, 1/15sec, Kodak Ektachrome E6, ISO 100, polarization filter, tripod