NEXT MEETING: Wednesday, April 21, 2021, 7:00 PM on Zoom: no business meeting. Our Featured Speaker, Wendy Sutton, PhD, will describe the ongoing sensitive issues involved in: "The Native American Graves Protection and Repatriation Act at 30 – Challenges and Successes in Returning the Ancestors to their Communities within a Federal Context." Watch for your Zoom invite and settle in at 6:45 PM; Wendy will begin her presentation at 7:00 PM sharp.

NEXT FIELD TRIP = WATCH THIS SPACE FOR UPDATES AS TO WHEN FIELD TRIPS WILL RESUME.

Fish Identification Via Petroglyph Part II
2020 Events A-Plenty

More Comparative Petroglyph Musings

Solar analemma white sandsThere are many multiple-exposure photographs existing throughout cyberspace that illustrate the solar analemma. Each week, a dedicated photographer photographs the sun from the same position during the course of a full year. The result is a photograph of 48 to 52 images of the sun in the shape of what most people recognize as a figure-eight, i.e., the "infinity" symbol. If photographed from the Northern Hemisphere the highest point of the analemma is the sun's position at the summer solstice and the lowest point is the position of the winter solstice. The path of the moon follows a similar analemma shape. Here on the right is one sample of a solar analemma via weatherscapes.com:

Canon de chelly infinity petroglyphFor comparison, here is a stock photo of an analemma petroglyph at Cañon de Chelly. It has been accepted that certain petroglyphs appear to track certain specific celestial events, including solstices and equinoxes. So is it too far-fetched to suggest that figure-eight petroglyph images reflect someone's tracking of the path of the sun and/or moon during the course of an entire year?

Happy 2020 to all!

/s/ webmaster

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