La Brea Tar Pit Riker Box Specimens Type:La Brea Specimen " The material was recovered

" The material was recovered from the Lance Formation in Wyoming and is estimated to be about 67

000 years ago so colors and size will vary

This occurs where the softer host rock is weathered or eroded to the extent that these crystals are separated

The bracelets are constructed with sturdy but flexible black cord so they'll stretch a bit further

Above: How do you like your T

La Brea Tar Pit Riker Box Specimens Type:La Brea Specimen " The material was recoveredAbove: The front of the Specimen Card for the Tar Pit Specimen. (Source: Smilodon californicus and Canis dirus fight over a Mammuthus columbi carcass in the La Brea Tar Pits, Robert Bruce Horsfall, 1913) The La Brea Tar Pits are among the most well known petroleum seeps in the world. Over millennia, such seeps can become lake like formations and trap unwary wildlife. Excavated animal remains at La Brea comprise nearly 700 different species, some