Geology The Geology of England is mainly sedimentary.

Vaalbara broke up 2.8 Ga ago.

Cacti and palm trees appeared.

The Induan at palaeos.com

Labyrinth Mind mapping

Mapping by Licadho

References External links

Rock layers deposited during an epoch are called a series.

The name derives from Greek Palaios ancient .

This period includes the Keweenawan Age at about 1100 Mya.

These events are the subject of much scientific controversy.

Geologic Time , by Henry Roberts.

The green algae were similar to today's sea moss.

Cambrian Series 2 is the unnamed 2nd series of the Cambrian.

Dryosaurus , a North American ornithopod.

The new name will also replace the older term Middle Cambrian .

The Sheinwoodian lasted from to million years ago.

Stanley, Steven M. Earth System History.

Blackwell Scientific Publications, Cambridge.

Later a fourth period, the Quaternary, was applied.

The Tremadocian lasted from to million years ago.

The seas were filled with a diverse fauna.

On land, the first forests were taking shape.

It was named after the city of Serpukhov, near Moscow.

The stage was named for the Changhsing Limestone.

The stage is named after Olenëk in Siberia.

Conodonts were present in Triassic marine sediments.

The Norian is a division of the Triassic geological period.

See Raetians for the Alpine people of antiquity.

1842 Paléontologie française.

The original type locality was located near Bath.

Terrains oolitiques ou jurassiques.

Tithonus was the son of Laomedon of Troy.

Doklady Earth Sciences 409(6) 843 846.

A GSSP had not yet been ratified in 2009.

2004 Dinosaur distribution , in ( eds.

1883 Traité de Géologie , Paris.

The Bartonian age spans the time between .

An official GSSP had in 2009 not yet been assigned.

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Addition of HCO3 will increase CO32 concentration at any pH.

The Furongian can be divided into a number of trilobite zones References

2004 A Geologic Time Scale 2004 , Cambridge University Press.

The stage was introduced by Russian stratigrapher Sofia Semikhatova in 1934.

The name was posthumously changed in Kasimov horizon by Dan'shin in 1947.