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Red Cone – Prominent Geological Features of Crater Lake National Park

This is the best preserved, the largest, and probably the youngest of the three northern cones. Much more lava escaped from this vent than from Desert Cone or Bald Crater. Not only do flows appear on the cone, along the south rim of the crater, and on its western wall, as well as on the north and east flanks, but thick tongues of vesicular basalt make up the prominent shoulder at the southeast base of the cone … [The Parasitic Scoria Cones of Mount Mazama: Red Cone, The Geology of Crater Lake National Park, Oregon (1942) by Howell Williams]

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