Sentences with phrase «shallow sea floor»

They are pinnacle reefs, built by cyanobacteria on the shallow sea floor 543 million years ago, during a time known as the Ediacaran period.

Not exact matches

In a shallow part of the sea floor underneath the ice shelf, a bedrock protrusion, named the Bawden Ice Rise, has served as an anchor point for the floating shelf for many decades.

But with climate change, the WAP is experiencing rapid regional warming, with fewer days each year of fast ice — letting the icebergs into the shallows more often, where they carve huge gashes through the habitat of the colorful, tentacled invertebrate animals carpeting the sea floor.

During this time, large (up to meter - sized) soft - bodied organisms, often shaped like discs or fronds, had lived on or in shallow horizontal burrows beneath thick mats of bacteria which, unlike today, coated the sea floor.

That leads them to suggest that the concentration of lumps may have come about when a large number of whales died and then sank to the sea floor, where the carcasses quickly decomposed in the warm, shallow waters but the ambergris — which on its own typically floats — was buried and preserved.

In a separate finding published this week, another research team reports teasing out plankton DNA that's up to 11,400 years old from the floor of the much shallower Black Sea.

For two hundred years, fleets of treasure galleons stuffed with silver and gold and emeralds had plied the Caribbean Sea, crisscrossed it every which way, from Key West down to Cartagena, from the Yucatán over to the Windward Islands, and every so often, one of those unpredictable West Indian cyclones would come spinning across the Caribbean and slam half the fleet onto shallow reefs, which ripped open the hulls and spewed that treasure all over the ocean floor.

Like the modern Gulf of Mexico, this shallow Cretaceous sea was occasionally subject to violent storms that disturbed the floor of the sea.

Most of the members of the clam family are bottom dwellers, usually shallow water, and with some exceptions, move slowly across or under the sea floor surface while a few are fixed in one place.

The fringing reefs here are shallow and slope gently to the sea floor.

This is a very shallow reef network with a sandy sea floor at around 14m with the reef rising to a couple of metres below the surface.

The scariest parts of the Siberian margin are the shallow parts, because this is where methane bubbles from the sea floor might reach the surface, and this is where the warming trend is observed most strongly.

For quite interesting reasons, the sea - floor in shallow waters north of Siberia is frozen.

Now come fears of a methane time bomb, part two, this one bursting from the sea floor of the shallow Arctic continental shelf.

Much of the color likely comes from resuspended sediment dredged up from the sea floor in shallow waters.