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historicalmarkerproject/markers/HM16W0_after-the-collapse_CRATER-LAKE-OR.html
About 6,800 years ago, at the climax of a series of dramatic eruptions, the top of Mt. Mazama collapsed. Left behind was the huge crater, or caldera, you see today. But before the caldera filled with water, there were more eruptions.
The most s…
historicalmarkerproject/markers/HM16VX_before-the-collapse_CRATER-LAKE-OR.html
When Mt. Mazama collapsed about 6,800 years ago, it left behind evidences of its former self. Like X-ray photos the steep caldera walls reveal the interior of Mt. Mazama before its fall. From this point several pre-collapse volcanic features can b…
historicalmarkerproject/markers/HM1663_glacial-valleys_CRATER-LAKE-OR.html
The collapsed volcano that now holds Crater Lake once stood more than a mile (1.6 km) above the present lake level. Called Mt. Mazama, this massive mountain of overlapping cones was high enough to support a cap of snow all year. During the Ice Age…