Wizard Island, Crater Lake, Oregon
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Oblique view looking northwest toward Wizard Island. The distance across the bottom of the image is about 1.5 kilometers (0.9 miles).
The cinder cone atop Wizard Island (which was named for its resemblance to a wizard`s hat) is composed of small fragments of frothy andesite. Blocky andesite lava flows emanate from the base of the cinder cone. Sinuous channels in the drowned lava field are depressions between lava flow lobes. The Wizard Island volcano rose from the floor of the caldera while Crater Lake was filling and ceased erupting before the lake reached its present level. As flowing lava reached the water`s edge, it shattered into melon-sized and smaller pieces that make up the slope below the old shoreline (S3) located 84 meters (262 feet) below the surface of the lake. An earlier shoreline (S2) at a depth of 180 meters (590 feet) can be seen partway down the east flank of the volcano, perhaps representing a pause in the series of eruptions that formed Wizard Island. At Skell Channel, lava flows from the Wizard Island volcano abut the caldera wall. These flows have been partially buried by loose rock falling from the talus below The Watchman and Hillman Peaks. At the right edge of this view is the younger rhyodacite dome.
Source: Gardner, James V., Peter Dartnell, Laurent Hellequin, Charles R. Bacon, Larry A. Mayer, and J. Christopher Stone. 2001. Bathymetry and selected perspective views of Crater Lake, Oregon. USGS Water Resources Investigations Report 01-4046.