The program will feature a presentation on archeoastronomy titled "The Pictographs Of Paint Rock, Texas- Rock Art As Solar Markers Defining Cultural Intent." Houston Archeological Society member Gordon Houston will present his astronomical studies of the site, the largest pictograph site in Texas located near San Angelo.

Since Ranch owner Kay Campbell discovered the first solar marker in 1999, many interested individuals have studied the site. No one has established how the native cultures were able to place pictographs to interact with sun and shadow displays on the cliff, which accurately define significant solar points on the calendar. Houston will talk about his findings from 20 visits to the site over two solar years. He will discuss solar marker interactions and the discovery of the potential horizon astronomy and how it ties to the material culture of the site.