YOUNGEST -- Rocks in California
N 40° 29.157 W 121° 30.457
10T E 626484 N 4482764
One of several interpretive signs found along the Lassen Peak trail.
Waymark Code: WMHWAD
Location: California, United States
Date Posted: 08/18/2013
Views: 2
California's Youngest Rocks
Scattered on the ground in front of you are California's youngest rocks-black dacite. With the volatile reawakening of Lassen Peak in 1914, repeated steam explosions tore and tossed existing rocks from the 27,000-year-old crater. But no new rock ever formed in the crater until the evening of May 14, 1915. A growing dome of dacite lava welled up and filled the crater. And then five days later, a violent steam blast shattered the dome and showered new rock here and about the summit.
You are .2 miles from the top.
Licking Red Flame
June 14, 1914
Just as I turned to leave the crater's rim, there was a puff of blue smoke, followed by a tongue of red flame...I started to pick my way down the mountain, but in a trice I was enveloped in a could of smoke, while a perfect hail of small volcanic bombs and cinders beat down upon me. Then I was struck by a stone about twice the size of my fist and felled me to the ground.
Lance Graham's account, Shasta Courier
Type of documentation of superlative status: Sign
Location of coordinates: Lassen Volcanic National Park
Web Site: Not listed
|
Visit Instructions:
Post one photo of the waymark that is a different view from the one on the page and describe your visit, including the date. Other information that you may regarding the waymark is encouraged. Neither you nor your GPSr need to appear in any photos!