Sentences with phrase «move over the mantle»

Plenty of evidence supports the idea that the Earth's outer layer is divided into large slabs that gradually move over the mantle.

Not exact matches

Since the island «birth order» moves from east to west, the Canaries must have formed as the continental plate drifted eastward over a stationary, periodically erupting plume of hot magma deep in Earth's mantle.

«If this was just a plate moving over a couple of mantle plumes, you'd expect them to line up, as they do in the Hawaiian Islands,» he said.

They analyzed the magnetism of ancient rocks to work out their locations on the globe over time, and measured how the material under Earth's crust, the mantle, moves the continents that float on its surface.

The three ancient Yellowstone supervolcano eruptions were only the latest in a series of more than 140 as the North American plate of Earth's crust and upper mantle moved southwest over the Yellowstone hotspot, starting 17 million years ago at the Oregon - Idaho - Nevada border.

«Over a period of a million years, which is our standard unit of measurement, the movement of the mantle can cause the surface to move up and down by hundreds of metres.»

For years, many geochemists have argued that parts of the deep mantle remain unchanged since the formation of the Earth, whereas many geophysicists and geodynamicists have held that the entire mantle has been convecting (moving and mixing) over geological time.

We moved to a 1940's cottage in May and I've been circulating all of my wallhangings over the mantle looking for the right fit — I think this piece would be the perfect match!