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Ordovician period dating

The supercontinent of Gondwana drifted over the south pole, initiating a great Ice Age that gripped the earth at this time.

The end of the period is marked by a major extinction event.

The Ordovician began about 490 million years ago and lasted for about 47 million years.

The Continents-Gondwanaland Gondwana was a huge supercontinent during the Ordovician Period.

The Ordovician /ɔrdəˈvɪʃən/ is a geologic period and system, the second of six of the Paleozoic Era, and covers the time between 485.4 ± 1.9 to 443.4 ± 1.5 million years ago (ICS, 2004).

It follows the Cambrian Period and is followed by the Silurian Period.

The corresponding rocks of the Ordovician System are referred to as coming from the Lower, Middle, or Upper part of the column.

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The Continents-North America and Europe Modern continents of North America, Western Europe and Northern Europe were located in the tropics, on or near the equator.

It ended with the Ordovician–Silurian extinction event, about 443.4 ± 1.5 Mya (ICS, 2004) that wiped out 60% of marine genera.

The Modern Geologic Time Scale, as shown above, documents intervals of geologic time relative to one another, and has been continuously developed and updated over the last two centuries.

It contained the modern continents of Australia, Africa, Southern Europe, Antarctica and South America.

During the Ordovician Period, Gondwana gradually moved toward the South Pole until it covered the pole at the end of the period.

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