The fossils date back to two possible eras, the Rancholabrean North American Land Mammal Age, discussed last post, and the Irvingtonian North American Land Mammal Age, which dates back 240,000 to 1.8 million years ago. This older geologic era shows indications of a freshwater lake bed. The fossil record includes freshwater snails, fish, mussels, and crayfish as well as reptiles and amphibians.
|Fossil collection from the BDPL3&4 project site displayed at the Children’s Natural History Museum.|
|Wes Gordon and the "Boy Paleontologists" excavating fossils in Fremont.|
Although the majority of the fossils from the ‘boy paleontologists’ went to the University of California Berkeley, some of the collection went to the San Lorenzo School District, where Wes worked. In 2004, the Gordon family approached the Math Science Nucleus in Fremont to take on this collection, which can now be seen at the organization's Children's Natural History Museum. The museum, located at 4074 Eggers Drive in Fremont, hosts dozens of student field trips each year, and is the only Bay Area museum to regularly display fossils from the Bay Area.