Thin Section of Dinosaur Bone
The circular patterns are the "concentric lamellae" of the "Haversian Canal" in the center.
Most of the Haversian canals in the fossil bone are filled with quartz or calcite. In live bone they are open and in
thin section would appear dark. The black specks are called "Osteocytes" and they are also preserved in
Transmitted Brightfield Illumination
Significance in the Environment:
Chinsamy-Turan, Anusuya, THE MICROSTRUCTURE OF DINOSAUR BONE, Johns Hopkins Publisher, 2005