geology facts

Wednesday, 14 December 2011

Gastropods

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How would you recognise a gastropod? This is easy as the animal is still in existence and its recognised by its soft parts. This gives us...
Monday, 12 December 2011

evolution of amphibians

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Amphibians were first land-dwelling creatures with four legs, known as tetrapods. They evolved from lobe-finned fish in the late Devonian ...
Wednesday, 7 December 2011

evolution of dinosaurs

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The amniotic egg Dinosaurs are believed to have laid amniotic eggs. These eggs are on of the most significant features in reptile evoluti...
Wednesday, 30 November 2011

Changing sea levels

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Isostatic and eustatic sea-level changes Changes in sea level due to local subsidence or uplift are referred to as  Isostatic . For examp...

Milankovich cycles

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The cycles are caused by changes in the amount of radiation reaching the earth from the sun over time. This is not because the Sun changes i...
Tuesday, 29 November 2011

Climate change over geological time

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We currently live in an icehouse where large continental ice sheets exist at both poles. The onset of this icehouse started in Antarctica 34...

Irregular echinoids

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Morphology Irregular echinoids are characterized by having the anus outside of the apical system. The anus has moved to the edge of the t...
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