Building Earth’s Surface. An aerial view from the south of the eruption of Mount St. Helens volcano on May 18, 1980. Interpreting Earth’s Surface. Observations Today we noticed all kinds of aspects of Earth that seem to need an explanation.
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Building Earth’s Surface
An aerial view from the south of the eruption of Mount St. Helens volcano on May 18, 1980.
(B) Stress has caused strain in the rock. Strain builds up over a long period of time.
(C) Rock breaks suddenly, releasing energy, with rock movement along a fault. Horizontal motion is shown; rocks can also move vertically.
(D) Horizontal offset of rows in a lettuce field, 1979, El Centro, California. (D) Photo by University of Colorado; courtesy National Geophysical Data Center, Boulder, Colorado.