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PHANEROZOIC - VISIBLE LIFE
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23.0
1.8
0.0
Carboniferous
Devonian
Permian
Cambrian
Ordivician
Silurian
Triassic
Jurassic
Cretaceous
Palaeogene
Neogene
Quaternary
PALAEOZOIC - ANCIENT LIFE
MESOZOIC - MIDDLE LIFE
CENOZOIC - NEW LIFE
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FOSSIL COLLECTION - NAVIGATION
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TIMESCALE (GIVEN IN Ma UNITS) IS IN ACCORDANCE  WITH THE  ICS INTERNATIONAL STRATIGRAPHIC CHART. IT IS NOT TO SCALE.
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Reproduced with the permission of the British Geological Survey ©NERC. All Rights Reserved
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