Sentences with phrase «craton of»

Not exact matches

However, a team of scientists has now discovered that these cratons that were assumed to be «as solid as a rock» are not that solid after all.

It was assumed that the cratons are stable because of their especially solid structure due to relatively low temperatures compared to the surrounding mantle.

A team of German - American scientists now discovered that these cratons that were assumed to be «as solid as a rock» are not that solid after all.

The team leading by Dr. Mikhail Kaban from the GFZ German Research Centre for Geosciences now discovered that the craton below the North American continent is extremely deformed: its root is shifted relative to the center of the craton by 850 kilometers towards the west - southwest.

Cratons are pieces of continents that have been largely stable for hundreds of millions of years.

As a result of plate tectonics, Alaska is an amalgamation of terranes that have collided with the North American craton and have accreted to become part of North America.

One ancient formation, the Zimbabwe craton, is of interest because «it looks like it was formed in a different way» from others, such as that in Australia (Pilbara) or South Africa (Kaapvaal).

«Re-melting or recycling of this primitive crustal ancestor produced the younger rocks of the Archean craton, which grew and stabilized to form the core of this part of the North American continent.»

We knew that the craton in northern Quebec had been formed by partial fusion of an ancient precursor crust, but for the first time we have specific information about the age and the nature of this older source,» lead author Jonathan O'Neil from the University of Ottawa's Department of Earth and Environmental Sciences said in a statement.

Cratons are the oldest portions of Earth's continents that have remained stable for over a billion years.

This unified piece of ancient continental crust, called a craton, lies exposed at the surface in the Canadian Shield, and forms a solid foundation...

Carol Finn, of the U.S. Geological Survey, a co-author on the paper, says, «Resolving the contradiction of the Gamburtsev high elevation and youthful Alpine topography but location on the East Antarctic craton by piecing together the billion year history of the region was exciting and challenging.