Banded iron formations: Oceans, algae and iron oxide
Iron ore is a big deal in Australia.
Iron ore is a big deal in Australia.
Earth Sciences
14 hours ago
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5
In the 1980s, a shell collection that included specimens from Captain Cook's final voyage was accidentally thrown into a skip and believed lost forever. But much to the joy of scientists, last week it was rediscovered safe ...
Other
14 hours ago
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27
An ocean (from Greek Ωκεανός, Okeanos (Oceanus)) is a major body of saline water, and a principal component of the hydrosphere. Approximately 71% of the Earth's surface (an area of some 361 million square kilometers) is covered by ocean, a continuous body of water that is customarily divided into several principal oceans and smaller seas. More than half of this area is over 3,000 meters (9,800 ft) deep. Average oceanic salinity is around 35 parts per thousand (ppt) (3.5%), and nearly all seawater has a salinity in the range of 30 to 38 ppt.
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