Sentences with phrase «diamond forms only»
Diamonds form only at temperatures and pressures far greater than those on Earth's surface.
https://www.sciencenews.org/
Schultz, professor of geological sciences at Brown and an impact specialist, said the most provocative evidence for an extraterrestrial impact was the discovery of nanodiamonds, microscopic bits of diamond formed only from the kind of intense pressure you'd get from a comet or meteorite slamming into the Earth.
Not exact matches
«Not only can this snapshot tell us about how, where and when certain diamonds form, it can tell us about more general features of the rocks in Earth's mantle.»
This level of internal pressure can only be explained if the planetary parent body was a Mercury - to Mars - sized planetary «embryo,» depending on the layer in which the diamonds were formed.
The particular composition and morphology of these materials can only be explained if the pressure under which the diamonds were formed was higher than 20 GPa (giga - Pascals, the unit of pressure).
«Previously, researchers could only assume that the diamonds had formed,» said Dominik Kraus, scientist at Helmholtz Zentrum Dresden - Rossendorf and lead author on the publication.
New research suggests the diamonds packed inside these meteorites could have only formed within a planetary body the size of Mercury or Mars — a planet that no longer exists.
That's interesting enough on its own, but it has much bigger implications — the team calculated that these diamonds could only have formed under pressure of more than 20 gigapascals.