The Palisades are Clues to the Past

The Palisades are Clues to the Past (HM1CXZ)

Location: Randle, WA 98377 Lewis County
Country: United States of America

N 46° 41.03', W 121° 32.959'

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The rock before you is a clue to a geologic mystery. Between 110,000 and 20,000 years ago, a volcano erupted about nine miles away. Dacite lava flowed here and stopped, forming an unusually deep pool. Geologists don't know for sure what blocked the lava. It may have been a glacier or a cliff.

The edge of the lava flow cooled much faster than the rest of the flows. This made fractures in the columns.

(Map Caption)
Map showing the general path of the dacite lava flow from a volcano vent on the ridge above Coyote Lake.

(Right Drawing Caption)
Revealing a mystery
Long after the lava cooled, the Clear Fork of the Cowlitz River scoured away softer material, exposing the Palisades.
Marker ConditionNo reports yet
Date Added Tuesday, October 7th, 2014 at 6:31pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)10T E 610937 N 5171052
Decimal Degrees46.68383333, -121.54931667
Degrees and Decimal MinutesN 46° 41.03', W 121° 32.959'
Degrees, Minutes and Seconds46° 41' 1.80" N, 121° 32' 57.54" W
Driving DirectionsGoogle Maps
Area Code(s)360
Closest Postal AddressAt or near 219 NF-1275, Randle WA 98377, US
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