Rules of Earthcache
Email the answers to me. DON'T POST IN YOUR LOG OR IT WILL BE
DELETED.
1. How deep was the water in the Wenatchee Valley during the ice
age flood?
2. How many feet below this earthcache was the water's edge?
3.The flood waters reached the base of what local rock
formation?
4. What is the name of the cresent bar located under East
Wenatchee?
5. To your log attach photo of valley and Columbia River.
First volcanos, then the ice age shaped this area of our state.
During the Ice Age large portions of Canada and the Northern United
States were blanketed by the Continental Ice Sheet. East of the
Cascade Range, the Okanogan Lobe extended southward as a broad lobe
that dammed the Columbia River to form Glacial Lake Columbia. Lake
Columbia's overflow -- the diverted Columbia River -- occupied
Grand Coulee between Ice Age Floods events.
Periodically, the ice dam would fail. These failures were often
catastrophic, resulting in a large flood of ice- and dirt-filled
water that would rush down the Columbia River. This towering mass
of water and ice literally shook the ground as it thundered towards
the Pacific Ocean, stripping away thick soils and cutting deep
canyons in the underlying bedrock. With flood waters roaring across
the landscape at speeds approaching 65 miles per hour, the lake
would have drained in as little as 48 hours. Many of the
distinguishing features of the Ice Age Floods remain throughout our
region today