No 4 - Throes Of Gravitational Tides

Ordovician - Silurian extinction
440 millions of year ago

Percent of animal families died out:

25% marine familes
60% marine general
Vertebrates not yet evolved

Impact Caused:

Drop in sea levels and formation of glaciers as temperature
of earth warmed again glaciers melted and sea level rose
causing floods world wide.

Impact Crater Located:

Unknown but extinction occurred mostly in tropical areas
around the equator.

Late Devonian extinction
360 - 364 millions of year ago

Percent of animal families died out:
22% marine familes
57% marine general
Vertebrate deaths unclear

Impact Caused:
Rise in volcanic activity
Rise in global temperatures

Impact Crater Located:

Extinction Occurred at the Frasnian-Famennian boundary.

Permian-Triassic extinction
251 millions of year ago

Percent of animal families died out:
53% marine familes
84% marine general
70% land species
95% of all living species

Estimated Size Of Impacter:
10 ~ 15 kilometres

Impact Caused:
Rise in volcanic activity worldwide
Loss of oxygen in oceans
Rise in global temperatures
Tsunamis hundreds of meters high

End Triassic Extinction
199 ~ 213 millions of year ago

Percent of animal families died out:
22% marine familes
52% marine general
Vertebrate deaths unclear

Estimated Size Of Impacter:
Several kilometres

Impact Caused:
Massive floods of lave erupting from Atlantic
(triggers the opening of the Atlantic ocean).
Global warming

Impact Crater Located:
Unknown, but rocks from eruption have been found in the
Eastern United States, Eastern Brazil, North Africa and Spain.

Cretaceous - Tertiary Extinction
65 million of year ago

Percent of animal families died out:
16% marine familes
47% marine general
18% land animals

Estimated Size Of Impacter:
4 ~ 5 kilometers

Impact Caused:
Lowering in global temperatures
Tsunamis hundreds of meters high
xxxxxxxxxxxxxxxxxx

Impact Crater Located:
Yucatan peninsula and beneath the Gulf of Mexico.
xxxxxxxxxxxxxxxxxx

A Fiery Encounter	A Fateful Rendezvous	A Celestial Visitor	Of Gravitational Tides	Circles Of Unrest
The Impact Extinction's	A Final Requiem	Acknowledgements		Back To Main Page