On July 7that 1:38 MST, a magnitude (*Mw) 3.5 earthquake shook the towns of Fredonia, Jacobs Lake, and Havasu (Figure 1).
Article category: Seismic
Article category: Geology
A recent paper in the journal Science reported on evidence they obtained documenting an ancient Grand Canyon of about 70 Ma (million years). The date is more than ten times the age that most of those in the photograph ascribe to the canyon.