A more or less daily photoblog with favorites of my photographs. Subjects are typically nature, landscape, astrophotos, existing light.
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Saturday, December 29, 2007
Petrified tree rings?
You can almost count the tree rings on these petrified logs! It's amazing to wonder what the planet would have been like when these trees were alive. It was early in the age of dinosaurs, about 220 to 225 million years ago. The supercontinent of Pangaea was just starting to break up into present day continents. And northern Arizona was a balmy jungle like climate sitting a few thousand miles southeast of its present location, much closer to the equator. North and South America had just separated from Africa. This image was taken at 24mm focal length with an exposure of 1/250 seconds at f/8, ISO 400.