“Southwestern Rock Calendars and Ancient Time Pieces”

Photo by Tom Herrick of an equinox “sun dagger” phenomenon on a Hohokam petroglyph in Pima County, Arizona.

This free presentation by archaeologist Allen Dart will be held on Monday, March 28, 2016 from 10:00 to 11:30 am at the Maricopa County Library District’s White Tank Branch Library, 20304 W. White Tank Mountain Rd., Waddell, AZ; cosponsored by Arizona Humanities. Native Americans in the Southwest developed sophisticated skills in astronomy and predicting the seasons, centuries before Old World peoples first entered the region. In this presentation archaeologist Allen Dart discusses the petroglyphs at Picture Rocks, the architecture of the “Great House” at Arizona’s Casa Grande Ruins, and other archaeological evidence of ancient southwestern astronomy and calendrical reckoning; and interprets how these discoveries may have related to ancient Native American rituals. The program is made possible by Arizona Humanities. For event details contact Hanna Bozhko at 602-651-2211 or HannaBozhko@mcldaz.org. For information about the activity subject matter contact Allen Dart at Tucson telephone 520-798-1201 or adart@oldpueblo.org.