Friday, July 19, 2013
Craters of the Moon National Monument
We visited the other half of Hell's Half Acre! Well, the area of Craters of the Moon is a bit more than half of an acre, like about 750 thousand acres. The land here in southeastern Idaho does have a connection, however with Hell's Half Acre as well as Yellowstone. The Snake River Plain extends across southern Idaho in a 400 mile arc, one of the largest volcanic regions in the earth. Its geologic features indicate that about 16 million years ago the volcanic activity began and continues today in the geysers and hot springs of Yellowstone. Craters of the Moon represent the most recent eruptions, which occurred only 2,000 years ago. First scientific proof of the age of that flow was found in the growth rings of the core of a limber pine, which took root after the lava cooled. Age of the tree was estimated to be about 1,350 years old. Oral traditions of Native Americans also tell of a time when the lava flowed.