First Rule of City Planning - No Volcanoes

Another NASA Earth Observatory nomination for the cool Geo-Pic also follows a good rule of city planning - avoid volcanoes.

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Cut & Paste Description:

" This astronaut photograph highlights Cerro (Spanish for “hill”) Culiacan, part of the 50,000 km2 Michoacán-Guanajuato volcanic field of west-central Mexico. The volcanic field contains over 1,400 known vents, with cinder cones, steep, cone-shaped hills, being the dominant landform.

Cerro Culiacan however, is a shield volcano, a more gently sloping mound formed by basaltic lavas. Cerro Culiacan most likely formed during the Pleistocene Epoch approximately 10,000 to 2 million years ago. Shield volcanoes in the Michoacán-Guanajuato field tend to have steeper slopes than similar volcanic structures elsewhere (namely Iceland; this is perhaps due to slightly thicker or higher-viscosity lavas), and the 1,100-meter high Cerro Culiacan is no exception.... "

Full article: http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=18010