Did you know that Colonial Americans used large sheets of mica as glass for windows?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
Lahar
xLahar : A mudflow or landslide composed of pyroclastic material and water that flows down from a volcano, typically along a river valley. Lahars can be huge, fast, and deadly.
Geologists have learned that a large earthquake and tsunami that killed 192 people on September 29, 2009 in Samoa, American Samoa and Tonga was in fact a triple-whammy. The magnitude 8.1 "great earthquake"...Read more