The Arizona Geological Survey has just released its winter edition of Arizona Geology magazine which is available for free download here. Each story is well-documented with photos and videos.
The lead story is a case study of the June, 2010, Shultz wildfire near Flagstaff which denuded the forest and with heavy rains, lead to flooding. “In June 2010, the Schultz Wildfire burned 15,000 acres of woodland on the east slope of the San Francisco Peaks in the Coconino National Forest. Near record monsoon rains in July and August produced debris flows and floods, the latter of which damaged dozens of homes, caused the temporary evacuation of over 1000 people, and led to one drowning death.”
The story on Arizona earthquakes shows maps of locations and magnitudes of 50 earthquakes recorded in Arizona during 2010. These observations are made possible by the new Arizona Integrated Seismic Network (AISN) which is in its third year in operation. The story tells us why Arizona earthquakes occur where they do. The article also provides a link to discussion and photos of the strong April 4, 2010, earthquake in northern Baja California, just southwest of Yuma.
Until recently, topics concerning geology were mostly absent in the displays and interpretive signs found within Grand Canyon National Park. That omission has now been remedied.
Billed by its creators as “the world’s largest geoscience exhibition at one of earth’s grandest geologic landscapes,” the Trail of Time interprets the geology of Grand Canyon’s spectacular views and its largely inaccessible rocks. The trail leads visitors towards key geologic concepts that can be read in the rocks of the canyon and serves to help people contemplate and more fully appreciate the enormity of geology and the larger meaning of geologic thought. One of the recurrent themes presented on the trail is that of “deep time…”
In the article titled “Summary of Oil and Gas Activity” we learn that oil & gas exploration and production, although small, does occur in Arizona. Additional wells were drilled for geothermal energy exploration and to test for carbon dioxide sequestration.
The Winter edition of Arizona Geology contains very interesting articles. Give it a look at: