Geological Time scale
,Definition: Arrangement of Eras, periods and epochs on the time
scale in an order of their age is called Geological Time scale (GTS).
Names of eras are based on name of place eg. Permian from
Perm
Tribe eg Ordovician from Ordovices
Carboniferous: large coal deposits
Palaeozoic era because ancient life forms
Glovanni Arduina 1760: First GTS
Sequence of events in the history of earth
, 6 Eras
Indicates characteristic stages of development of fossils
borne by them
1. Azoic: Time of no life
2. Archeozoic: Time of initiation of life
3. Proterozoic: Time of earliest life
4. Palaeozoic: Time of ancient life
5. Mesozoic: Time of middle life
6. Coenozoic: Time of recent life
,
,Definition: Arrangement of Eras, periods and epochs on the time
scale in an order of their age is called Geological Time scale (GTS).
Names of eras are based on name of place eg. Permian from
Perm
Tribe eg Ordovician from Ordovices
Carboniferous: large coal deposits
Palaeozoic era because ancient life forms
Glovanni Arduina 1760: First GTS
Sequence of events in the history of earth
, 6 Eras
Indicates characteristic stages of development of fossils
borne by them
1. Azoic: Time of no life
2. Archeozoic: Time of initiation of life
3. Proterozoic: Time of earliest life
4. Palaeozoic: Time of ancient life
5. Mesozoic: Time of middle life
6. Coenozoic: Time of recent life
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