The Beginning of Plate Tectonics

Continents form
3 billion years ago?

Today, Earth’s surface is divided into a few dozen plates of rock, one of which sometimes ploughs under another to be destroyed in the planet’s molten heart. This process, called plate tectonics, is thought to have begun around 3 billion years ago. Only when plate tectonics had come into operation could the first continent, nicknamed ‘Ur’, come into being.

See other: History of Life


One thought on “The Beginning of Plate Tectonics

  1. Interesting choice of names – Wictionary informs that “Ur” is most often used as a prefix, “forming words with the sense of ‘primitive’, which seems highly fitting for a first continent.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s