The Earth Forms 4.5 Billion – 350 Million

• 541 to 485.4 Mya Cambrian Earth – An Explosion of Evolution 
• 485.4 to 443.8 Mya Ordovician – Colonising the Barren Land
• 443.8 to 419.2 Mya Silurian The Age of Fungus) 
• 419.2 to 358.9 Devonian – The Age of Fishes and Forests