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COLLIER CONE, HIGH CASCADES, OREGON
The view from the summit of 600 ft-high Collier Cone, a late Holocene cinder cone situated at the northern base of the Middle Sister (the largest peak in the picture at 10,085 ft ASL). Basaltic tephra from the cone blankets the nearby hills to the east. If you press the red bulls-eye button in the lower lefthand corner of the viewer, a marker will appear at Obsidian Cliffs, one of Oregon's most archaeologically-significant prehistoric sources of obsidian. This obsidian-rhyolite flow is located about 2.5 miles west from Collier Cone.
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