Before the Collapse

Before the Collapse (HM16VX)

Location: CRATER LAKE, OR 97604 Klamath County
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Country: United States of America
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N 42° 54.78', W 122° 8.496'

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Mount Mazama

— Crater Lake National Park —

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 be identified.

The massive gray monolith on the rim ahead is Llao Rock. It formed when a large outpouring of lava filled an explosion crater on the north slope of Mt. Mazama. When Mt. Mazama collapsed, part of the hardened lava flow broke off and fell into the caldera, leaving the downslope portion perched on the rim.

The jagged, colorful spires of Hillman Peak in the foreground are the remains of a secondary volcano which erupted on the side of Mt. Mazama. This satellite cone attained a height of 1,000 feet (300m). Erosion here has exposed a maze of clogged and solidified lava conduits that fed the Hillman volcano.
HM NumberHM16VX
Placed ByNational Park Service
Marker ConditionNo reports yet
Date Added Wednesday, October 8th, 2014 at 9:05am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)10T E 570065 N 4751511
Decimal Degrees42.91300000, -122.14160000
Degrees and Decimal MinutesN 42° 54.78', W 122° 8.496'
Degrees, Minutes and Seconds42° 54' 46.80" N, 122° 8' 29.76" W
Driving DirectionsGoogle Maps
Area Code(s)541
Closest Postal AddressAt or near 2101 Rim Dr, CRATER LAKE OR 97604, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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