Pumice Desert

Pumice Desert (HM16VU)

Location: Crescent, OR 97733 Klamath County
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Country: United States of America
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N 43° 1.636', W 122° 7.161'

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The pumice deposits you are now standing on are the product of Mt. Mazama, an explosive volcano that collapsed to form the Crater Lake caldera. Mazama stood about 6 miles (9.7 km) south of here (to your left).

About 7,700 years ago Mt. Mazama erupted torrents of seething, red-hot pumice and other volcanic rocks. These glowing avalanches raced down the slopes and flooded the valley that lay here with deposits over 100 feet (30 m) deep.

Even after thousands of years, few trees have become established on the Pumice Desert. There is ample water under the surface, but deficiencies in the soil limit plant growth. Many more years will pass before the surrounding lodgepole pines transform the desert to a forest.

(Inscription within the drawing of Mt.Mazama)
Avalanches of heated rocks ejected by Mt. Mazama flooded downhill. Mostly pumice and scoria, the porous rocks discharged gasses that buoyed up the flow. Some rocks travelled up to 25 miles (40 km) beyond this point.
HM NumberHM16VU
Placed ByNational Park Service
Marker ConditionNo reports yet
Date Added Monday, September 8th, 2014 at 6:13am PDT -07:00
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Locationbig map
UTM (WGS84 Datum)10T E 571748 N 4764218
Decimal Degrees43.02726667, -122.11935000
Degrees and Decimal MinutesN 43° 1.636', W 122° 7.161'
Degrees, Minutes and Seconds43° 1' 38.16" N, 122° 7' 9.66" W
Driving DirectionsGoogle Maps
Area Code(s)541
Closest Postal AddressAt or near 1220 Crater Lake Hwy N, Crescent OR 97733, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

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