A more or less daily photoblog with favorites of my photographs. Subjects are typically nature, landscape, astrophotos, existing light.
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Tuesday, September 04, 2012
You Old Fossil
These first two images are on a layer in the Quarry site at Dinosaur National Monument which is preserved for visitors inside a building. These bones are about 150 million years old - farther back in time from the K-T boundary when the Dinosaurs went extinct 65 million years ago than the K-T boundary is from us today. The bones collected in this layer most likely after dying elsewhere and being washed downstream before collecting in a common area over millions of years. both images were taken with my 24mm lens and an exposure of 1/80 seconds at f/4, ISO 400
This image finally gives you some scale for the size of the bones - notice the gentleman and his son at the bottom right of the layer of bones visible here. They are generally quite large. This layer extended in all 4 directions, left, right, up and down. It was excavated starting in about 1910 by Earl Douglass from the Carnegie Museum in Pittsburgh. They removed huge layers of rock and dirt to get to the layers that contained the dinosaur bone fossils like these.
Another pair of views of the wall of dinosaurs - you can see how small we humans are in the 2nd view. The last 3 images were all taken with my 24mm lens and an exposure of 1/60 seconds at f/4, ISO 400.
A closeup of a segment of vertabrae with my 75-300mm lens at 120mm focal length with an exposure of 1/50 seconds at f/4.5, ISO 400.