Rugged Crest – Prominent Geological Features of Crater Lake National Park
At Cleetwood Cove, on the north wall of Crater Lake, the stratified lavas and pyroclastic rocks are suddenly interrupted by a dark, jagged tongue of dacite which descends from the rim to the water’s edge. The caldera rim, elsewhere fairly smooth, is here so broken by bristling crags of glassy lava as to be called the Rugged Crest … [The Northern Arc of Vents: The Cleetwood Flow, The Geology of Crater Lake National Park, Oregon (1942) by Howell Williams]
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