Sentences with phrase «crustal rocks»
"Crustal rocks" refers to the solid, rocky layer of the Earth's crust that makes up the outermost part of the planet's surface. Full definition
Scientists are studying this mound to gain an understanding of the interaction of crustal rocks and seawater, and to learn how sulfide mounds on land were formed millions of years ago.
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In a 2003 paper published in Nature, Fisher and others reported that bottom seawater entered into one seamount, traveled horizontally through the crust, gaining heat and reacting with crustal rocks, then discharged into the ocean through another seamount more than 50 kilometers away.
The high ground beyond the crater is the favorite of spectroscopists, who have detected an abundance of water - altered minerals in crustal rocks there.
Then Earth reached a critical point 2.3 billion years ago when the fumes released when crustal rocks are squeezed and deformed could no longer absorb the oxygen produced by bacteria.
The meteorite is made of volcanic rock, and the presence of water in it suggests that crustal rocks on Mars interacted with surface water that was delivered by volcanic activity, near - surface reservoirs or by impacting comets, Agee says.
To learn more about the conditions under which magma turns into crustal rock, Dygert and his collaborators examined rock samples that were part of the Earth's mantle a hundred million years ago, but are now part of a canyon in Oman.
An alternative explanation for the oscillations is that the earthquake may have driven cracks in the seafloor down into hotter crustal rocks, releasing heat into the system.
The ubiquity of the buoyant crustal rock points to a formation process that worked the same way across the moon, such as a magma ocean.
Earth's surface is clad in rigid rock plates — together called the lithosphere — formed of surface crustal rock laminated on to hard cold mantle rocks.
The continental rise is underlain by crustal rocks of the ocean basin.
Outside of that is a ring in which pyroxene mixes with the standard crustal rocks of the lunar highlands.
Obviously, the formation of sea floor mineral deposits and the interaction of seawater with crustal rocks has a big influence on the composition of the crust and may be the «icing on the cake» as they say that determines the geological properties of the sea floor.
For a microbial biosphere at some depth in crustal rocks and sediments, impact at the surface zone did not matter,» he says.
«Isotope geochemists traditionally use Strontium (Sr) isotopes to track the evolution of Earth's mantle and crustal rocks, and its oceans.
Age is critical because it takes about 200 million years for oxygen isotopes in the seas and crustal rocks to be homogenised by cycling through thermal vents in the ocean floor.
According to this theory for lunar formation, a rock type called ferroan anorthosite, or FAN, is the oldest of the Moon's crustal rocks, but scientists have had difficulty dating FAN samples.
Lithosphere - The upper layer of the solid Earth, both continental and oceanic, which comprises all crustal rocks and the cold, mainly elastic part of the uppermost mantle.