Fossil Friday. Check out this large fossil section from a Brachiosaurus. Also keep an eye out for the ghost man in the image.
© The Field Museum, CSGEO16166, Photographer Charles Carpenter.
Brachiosaurus altithorax. The sixth pre-sacral vertebra of P 25107, the holotype of Brachiosaurus altithorax, Riggs, 1903. “Sixth pre-sacral” means it is the sixth backbone in front of the pelvis. Riggs did not have all the chest backbones, just an articulated string of 7 connecting to and in front of the hip vertebrae (sacrals), so he couldn’t number them any other way. Field Columbian Museum preparation area visible in background.
The specimen was discovered on July 4th, 1900 near Grand Junction, CO (the Colorado River was called the “Grand River” back then) by Riggs’ assistant, H. W. Menke. For decades after its discovery, this dinosaur was considered the largest animal to ever walk on land.
6 1/2 x 8 1/2 glass negative
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