PRI Teaching Geology Guide
May 30, 2013 | Paleontological Research Institution
"The Paleontological Research Institution (PRI) [...] offers many education materials and opportunities for science teachers and students at all grade levels. Their online “Teacher Friendly Guide” gives brief geologic histories of every region of the United States. Also available online are photos and descriptions of the museum’s fossil collections." Quoted from the Earth Science Week Newsletter.
Sinkholes in Arizona
March 10, 2013 | Tucson Citizen
The Tucson Citizen has an article about sinkholes in Arizona. Like in Florida, karst features in Arizona can develop over limestone, but gypsum and salt can also support karst topography.
Publications from the Arizona Geological Survey include:
Home Buyer's Guide to Geologic Hazards in Arizona
Land Subsidence and Earth Fissures in Arizona
Perseids Meteor Shower Peaks August 11 to 13
August 11, 2013 | National Geographic
National Geographic has published a guide for observing the Perseids meteor shower which peaks between August 11 and 13.