West Bar Giant Current Ripples
N 47° 13.879 W 120° 00.723
10T E 726170 N 5235201
This is a viewing spot of the West Bar Current Ripples.
Waymark Code: WM16M8
Location: Washington, United States
Date Posted: 02/02/2007
Views: 106
West Bar is blanketed with one of the most classic examples of giant current ripples. The orientation of the giant current ripples indicates they formed from an Ice-Age flood restricted to the Columbia River Valley (i.e., from the north) at the end of the last glacial cycle, probably between 12,000 and 13,000 years ago. The ripples average 24 feet in height and are 360 feet apart and composed of boulders up to 4.5 feet in diameter. The ripples currently lie a full 150 to 250 feet above river level. Based on ripple size and spacing, geologists have estimated the floodwaters were about 650 feet deep when the ripples formed. That means the flood that created the West Bar megaripples must have rose to at least the height of Babcock Bench
Visit Instructions:
You must actually visit a feature to post a log for it. You must post a picture that you have taken at the feature to have the waymark approved. It has to be in one of the states listed above.