Fajada Butte, Sun Dagger

Exert from Carl Sagan, ’Cosmos, Episode 3: The Harmony of the Worlds,’ c. 1980..... Sun Dagger Solar Marker At Equinox 850–1250 CE Located in Chaco Canyon, New Mexico, the Sun Dagger Solar Marker at the Equinox was created by the Ancestral Puebloans. While the rock formation was a work of nature, the Pueblos specifically and deliberately placed the spirals as a way to identify the summer and winter solstice, as well as the spring and fall equinoxes.