La Brea Tarpit Small Mammal Bones For Sale
The La Brea Tar Pits (or Rancho La Brea Tar Pits) are a group of tar pits around which Hancock Park was formed, in urban Los Angeles. Asphaltum or tar (brea in Spanish) has seeped up from the ground in this area for tens of thousands of years. The tar is often covered with dust, leaves, or water. Over many centuries, the bones of animals that were trapped in the tar were preserved.
This seepage has been happening for tens of thousands of years. From time to time, the asphalt would form a deposit thick enough to trap animals, and the surface would be covered with layers of water, dust, or leaves. Animals would wander in, become trapped, and eventually die. Predators would enter to eat the trapped animals and also become stuck.
As the bones of dead animals sink into the asphalt, it soaks into them, turning them a dark-brown or black color. Lighter fractions of petroleum evaporate from the asphalt, leaving a more solid substance, which encases the bones. Apart from the dramatic fossils of large mammals, the asphalt also preserves microfossils: wood and plant remnants, rodent bones, insects, mollusks, dust, seeds, leaves, and even pollen grains.
Other asphalt deposits can be found in Texas, Peru, Trinidad, Iran, Russia, Venezuela, and Poland, with Rancho La Brea being the most famous.
Specimen Display Size: 8 1/4" X 6 1/8" X 2 1/8"; about 50 bones of various small
mammals are presented.
From the Jensan Scientifics, LLC Collection; Guaranteed Authenticity with information.
Collected in 1940.