View from above the Palmer Snowfield, looking south. We are standing on the “Timberline surface” – produced by landslides and eruption about 1500 years ago.
Looking down toward Timberline Lodge from near Crater Rock
A close up of a block of andesite lava from the Old Maid eruption. The darker clot is a small blob of hotter magma that is mixing with the lighter coloured magma around it.
A polygonally jointed andesite lava block. The fractures show this rock was very hot and cooled rapidly when it rolled down the mountain to arrive at this spot on the Timberline surface.
Oregon’s youngest volcanic rock – produced by a pyroclastic flow after collapse of an Old Maid age lava dome.
Collecting lava samples from near Timberline Lodge
