Fossils And The Geological Timescale

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Fossils And The Geological Timescale

'' Precambrian '' (3.8 billion to 570 million years ago)

--- Bacteria and blue-green Algae

---First complex multicellular organisms and soft-bodied animals, Charnia

'' Cambrian '' (570 to 500 million years ago)

---First Invertebrate s

'' Ordovician '' (500 to 440 million years ago)

'' Silurian '' (440 to 410 million years ago)

---First land Plant s

---First land invertebrates

'' Devonian '' (410 to 365 million years ago)

---First ferns and seed plants

---First Insect s

---First Amphibians

---First Ammonite s

'' Carboniferous '' (365 to 290 million years ago)

---First flying insects

---First Reptile s

'' Permian '' (290 to 245 million years ago)

---Extinction of Trilobite s

'' Triassic '' (245 to 210 million years ago)

---First Dinosaur s

---First Mammal s

'' Jurassic '' (210 to 140 million years ago)

---First Bird s

'' Cretaceous '' (140 to 65 million years ago)

---First Flowering Plant s

---First Primate s

---Extinction of dinosaurs

---Extinction of Ammonite s

'' Paleocene '' (65 to 55 million years ago)

---Diversification and spreading of mammals

'' Eocene '' (55 to 38 million years ago)

'' Oligocene '' (38 to 25 million years ago)

---First Grass

'' Miocene '' (25 to 5 million years ago)

'' Pliocene '' (5 to 2 million years ago)

---First Hominid s