The cyanobacteria have an extensive fossil record. The oldest known fossils, in fact, are cyanobacteria from Archaean rocks of western Australia, dated 3.5 billion years old. This may be somewhat surprising, since the oldest rocks are only a little older: 3.8 billion years old!

Which fossil is the oldest which fossil is the youngest?

The oldest layers are on the bottom, and the youngest layers are on the top. Because sediments sometimes include once-living organisms, sedimentary rock often contains a lot of fossils. Fossils are once-living organisms that have been turned into rock, in which the shape or form of the organism can still be seen.

What is the oldest fossils recorded 3500 Ma?

When did life begin? The origin of life cannot be dated precisely. However, the oldest fossils known microscopic cellular filaments petrified in the Apex chert of Western Australia — provide a mini- mum date: Life was present at least 3,500 Ma.

Which dinosaur died last?

Triceratops He and all of the other researchers, however, suspect that more recent dinosaurs even closer to the K-T boundary will be found in the future. For now, however, the 65-million-year-old Triceratops is the worlds last known surviving dinosaur.