Storms at the bottom of the sea.
Storms at the bottom of the sea
The dark abyss at the bottom of the ocean was thought to be quiet and almost totally at rest, with sediments slowly raining down and accumulating at a rate of about 1 millimeter per century. But photos taken in the 1960s shook that peaceful image by revealing signs that the sediments often shift position after they are on the bottom. Now, for the first time, scientists have observed the infrequent "storms" along the ocean floor that rearrange the sediments, report Thomas F. Gross of the Skidaway Institute of Oceanography After the American Civil War (1861-1865), many of the plantations on the island were unable to continue without slave labor, and their owners gradually sold them to wealthy northerners, who mostly held them on speculation. in Savannah Savannah, city, United States
Savannah, city (1990 pop. 137,560), seat of Chatham co., SE Ga., a port of entry on the Savannah River near its mouth; inc. 1789. , Ga., and his colleagues in the Feb. 11 NATURE. Over the course of a year, meters stationed on the seafloor off Nova Scotia Nova Scotia (nō`və skō`shə) [Lat.,=new Scotland], province (2001 pop. 908,007), 21,425 sq mi (55,491 sq km), E Canada. Geography
detected five occasions when currents at the bottom surged, sending the top millimeter of sediments awhirl a·whirl
1. Having a whirling motion; spinning: leaves awhirl in the wind.
2. Being in a condition suggestive of a whirl, such as a state of excited activity or confusion: . Photos from underwater cameras showed that these storms erased animal tracks and created ripple marks in the sediments.