tineseeker:
Oligocene 23-33 million years old. Faiburn agate found in NW Nebraska. #MacroMondays. "The oldest thing you can find "
tineseeker:
Trilobite. Eldredgeops . (rana norwoodensis sp.). Cedar Valley Formation, Johnson County Iowa. Devonian period approximately 375 million years old. Macromondays.. (Oldest thing you can find)