In time,they said, the moving ocean floor is blocked when it comes up against the edge of a continent.

VOA: special.2010.01.12

Mister Wegener said the lighter continental rock floated up through the heavier basalt rock of the ocean floor.

VOA: special.2010.01.12

They said a thin valley in the Atlantic Ocean was a place where the ocean floor splits.

VOA: special.2010.01.12

They are now discovering strange, new species of plants, animals and organisms surviving near hot currents that come out of the ocean floor.

VOA: special.2009.01.13

Also,the continents and the ocean floor are not made of the same kind of rock.

VOA: special.2010.01.12

He says current knowledge of life on the ocean floor is especially limited.

VOA: special.2009.01.13

The ocean floor is basalt rock, a mixture of silicon and magnesium.

VOA: special.2011.01.04

Wegener also noted differences between the continents and the ocean floor.

VOA: special.2010.01.12

He says serpentine or serpentinite, is formed under the ocean floor and is common in coastal areas like California.

VOA: standard.2010.07.26

"Coral reefs only make up about one tenth of one percent of the ocean floor."

VOA: standard.2010.05.26

The trench is an extremely deep hole on the floor of the Indian Ocean.

VOA: special.2009.03.17