Subdivisions. The Ordovician is the second period of the Paleozoic era. The Ordovician began after the end of a series of extinction events known as the Ordovician-Silurian extinction events which ended around 488 mya.
As a state highpointer, Humphrey's Peak in Arizona was on my bucket list. The trailhead was easy to find. The trail itself was not well maintained and rather rocky, which wasn't too bad going up, but required a lot of caution descending to protect your knees.
List of Arizona locations by per capita income. (Redirected from Richest Places in Arizona) Arizona has the twenty-ninth highest per capita income in the United States of America, at $20,275 (2000). Its personal per capita income is $26,838 (2003). Arizona counties ranked by per capita income. Note: Data is from the 2010 United States Census Data and the 2006â2010 American Community Survey 5-Year Estimates.