Artist's conception of our solar system's solar nebula, the cloud of gas and dust from which Earth, the sun and our solar system's other planets planets formed. (Image credit: Painting copyright William K. Hartmann, Planetary Science Institute, Tucson) Approximately 4.6 billion years ago, our...
Earth’smain magnetic field permeates the planet and an enormous volume ofspacesurrounding it. A great teardrop-shaped region of space called themagnetosphereis formed by the interaction of Earth’sfieldwith thesolar wind. At a distance of about 65,000 km (40,000 miles) outward toward the ...
thesefaultswere found to occur approximately perpendicular to the ridge crest, continue as fracture zones that extend over long distances, and terminate abruptly against continental margins. They are not sites ofvolcanism, and their seismic activity is restricted to the area between offset ridge crests...
and by 4.54 billion years ago (within an uncertainty of 1%) the Earth and the other planets in the Solar System had formed out of the solar nebula - a disk-shaped mass of dust and gas left over from
There have been many estimates for when the earth's inner core was formed, but scientists from the University of Liverpool have used new data which indicates that the Earth's inner core was formed 1 - 1.5 billion years ago as it "froze" from the surrounding molten iron outer core. ...
Magnetofossils, i.e. magnetite nanocrystals of organic origins, are found in rocks of various ages. Presumably, the oldest fossils of this type come from layers formed 2.8 billion years ago (Kopp and Kirschvink2008). Their shape, size and morphology resemble bacterial magnetosomes (Gehring et ...
A year on Earth is approximately365 and a quarter days. Is there such a thing as a perfect calendar? What is time? How Many Moons Does Earth Have? Earth has one natural satellite, called theMoon. It was possibly formed when a large object, about the size ofMars, crashed into Earth in...
The abundance of N was decreased by approximately one order of magnitude during the late accretion phase owing to impact-induced atmospheric escape. The formation of oceans and the initiation of the carbonate-silicate cycle right after the solidification of the magma ocean trapped H and C into the...
The earth is made up of different layers that have different compositions and properties; they are responsible for how the continents are formed. All the layers...
(some 540 million years) to the evolution of the Anthropocene (changes) following the emergence of the first human-culture on the planet some 200 thousand years ago. Here we illustrate the value of this linked research through a number of examples, including: (i) geological field mapping with...