Photographer's Note

Bleached cliffs, Yellowstone national park, Wyoming, USA.
Yellowstone River Overlook, also called Calcite Springs Overlook Trail, is a short, easy loop walk that leads to a platform overlooking the Yellowstone River. Layers of basalt columns and thermal springs along the river's edge are also visible from this point of view.
The area was named by USGS geologist Arnold Hague in 1885.
The east wall of the Grand Canyon, facing the overlook, is a cross-section of layers of glacial drift resting on lake deposits and columnar basalt. The haxagonal columns of basalt are caused by cooling, shrinking and cracking of several basaltic flows.
The Yellowstone River flows above a volcanic fracture zone that allows geothermal discharge to reach the surface. Chemicals from Calcite Springs’ hot water vents are slowly turning the cliff to whitish, yellowish pulp.
Mike :-)
To be cont'ed...

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Additional Photos by Mike Seleznev (Selmik) Gold Star Critiquer/Gold Note Writer [C: 346 W: 4 N: 671] (3641)
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