GEO SOLUTIONS

CENOZOIC ERA ( RECENT LIFE ) THIS ERA IS SUBDIVIDED INTO TWO: Quaternary Era (The age of man)             Tertiary Era (The age of mammals) Periods under the Tertiary era:           Pliocene                 (about 05-02 Mya)           Miocene                 (about 25-05 Mya)           Oligocene                        (about 38-25 Mya)           Eocene                   (about 55-38 Mya)  ...

MESOZOIC ERA This is subdivided into three periods viz:           Cretaceous             (about 144   -   66.4   mya) - The youngest period in the Mesozoic era                     Jurassic                  (about 208   -   144   mya) Triassic                  (about 245   -   208   mya) – The oldest period in the Mesozoic era ACTIVITIES IN THE TRIASSIC PERIOD Appearance of Primitive Mammals Emergence of the Continents Terrestrial deposition starts Marine Invertebrates reduced in population (mass extinction) Archosaurs occured on land as dinosaurs, Pterosaurs in the air ...

THE PALAEOZOIC ERA (540 mya - 245 mya) This is divided into six periods namely:           Permian     (about 286   -   245   mya) Carboniferous     (about 360   -   286    mya) - First coal appeared Devonian       (about 408   -   360   mya) – This is the age of fish Silurian     (about 438   -   408   mya) Ordovician   (about 505   -   438   mya) - This is the age of Graptolites Cambrian     (about 540   -   505   mya) – This is the age of trilobites. More lives emerged on Earth in this Period ACTIVITIES IN THE CAMBRIAN PERIOD           Sea transgression           Mild climate         ...