Marker Logo HMdb.org THE HISTORICAL
MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Near Greenwater in Pierce County, Washington — The American West (Northwest)
 

Mud on the Move

Osceola Mudflow

 

óMather Memorial Parkway ó

 
Mud on the Move Marker image. Click for full size.
By J. J. Prats, May 17, 2015
1. Mud on the Move Marker
Click on image to zoom in to explore the diagrams.
Inscription. Mud on the Move. Along with lava and ash, the volcanically active Mount Rainier has contributed thick flows of mud from its sides and summit. One of the largest mudflows occurred about 5,800 years ago sending thick rivers of mud down the White River drainage.

These flows carried rock and huge boulders, some 35 feet tall and several hundred feet around, from the mountainís slopes to the surrounding lowlands.

Osceola Mudflow. The largest of the mountainís historic flows, the Osceola mudflow covered an area of about 100 square miles. It buried the present town site of Enumclaw (24 miles west of here) under as much as 70 feet of debris.

Seismic activity triggered the mudflow, resulting in the collapse of nearly 2,000 feet of Mt. Rainierís summit.
 
Erected by Mt. Baker-Snoqualmie National Forest.
 
Location. 47° 3.166′ N, 121° 34.325′ W. Marker is near Greenwater, Washington, in Pierce County. Marker is on Chinook Pass Highway (State Highway 410) 7.5 miles south of Greenwater, on the right when traveling west. Touch for map. It is at the scenic pulloff. Marker is in this post office area: Enumclaw WA 98022, United States of America.
 
Other nearby markers. At least 1 other
Mud on the Move and Why is the River White? Markers image. Click for full size.
By J. J. Prats, May 17, 2015
2. Mud on the Move and Why is the River White? Markers
marker is within walking distance of this marker. Why is the River White? (here, next to this marker).
 
Categories. Natural Features
 
The Mountain – Mt. Rainier image. Click for full size.
By J. J. Prats, May 17, 2015
3. The Mountain – Mt. Rainier
 
 
Credits. This page was last revised on June 16, 2016. This page originally submitted on June 15, 2015, by J. J. Prats of Springfield, Virginia. This page has been viewed 208 times since then and 24 times this year. Photos:   1, 2, 3. submitted on June 15, 2015, by J. J. Prats of Springfield, Virginia.
Paid Advertisement