| 单词 | craton |
| 例句 | New York City was on the edge of the craton — imagine Japan with respect to Asia. When Manhattan Was Mannahatta: A Stroll Through the Centuries 2020-05-13T04:00:00Z The churning mantle can cause ripples at the craton’s base, setting off eruptions over tens of millions of years, helping explain why many kimberlites seem to migrate toward continental interiors over such a long time. When Ancient Eruptions Pumped Diamonds to Earth’s Surface 2023-07-26T04:00:00Z Jackson, who once helped evaluate lease blocks in a region of Mali several hundred kilometers away from Bourakébougou, believes greenstone belts deep in the West African craton are driving the hydrogen production there. Hidden hydrogen: Earth may hold vast stores of a renewable, carbon-free fuel 2023-02-15T05:00:00Z A craton has two main parts: the shield, which is crystalline basement rock near the surface, and the platform made of sedimentary rocks covering the shield. An Introduction to Geology 2017-01-01T00:00:00Z “At the very edge of the craton we get these carbonatite lavas,” he says. Hidden carbon layer may have sparked ancient bout of global warming 2022-06-23T04:00:00Z By analyzing the samples, analysts identified part of the North Atlantic craton, a remnant of the Earth’s ancient continental crust that stretched from Labrador to Scotland. Fragment of lost continent discovered in Canada 2020-03-23T04:00:00Z Geologists call it a craton - a stable region of crust that is not undergoing major activity. How Greenland scorched its underside 2018-08-01T04:00:00Z There is a backstop—the craton, that ancient unbudgeable mass at the center of the continent—and, sooner or later, North America will rebound like a spring. The Earthquake That Will Devastate Seattle 2015-07-20T04:00:00Z Continental crust that does not contain a craton is called a continental fragment, such as the island of Madagascar off the east coast of Africa. An Introduction to Geology 2017-01-01T00:00:00Z “And adjacent to the craton we get high CO2 fluxes.” Hidden carbon layer may have sparked ancient bout of global warming 2022-06-23T04:00:00Z Beneath northeastern Europe, the direction of the fast anisotropic axis follows trends of ancient rift systems older than 350 million years, suggesting “frozen-in” anisotropy related to the formation of the craton. [Report] Mapping Tectonic Deformation in the Crust and Upper Mantle Beneath Europe and the North Atlantic Ocean 2013-08-22T18:26:04.363Z Subduction at the edge of cratonic plates allows oceanic crust to sink deep into the mantle underneath the craton. Some facets of the geology of diamonds 2013-05-09T13:15:00.553Z The preservation of the Gabon reactors is a result of two factors: the long-term stability of the African craton, and the isolation of the uranium deposits from oxidizing groundwater. Nature's Nuclear Reactors: The Two Billion Year Old Natural Fission Reactors in Gabon, Western Africa 2011-07-13T11:15:00.240Z With the hundreds of samples we have to work with, we hope to find patterns that we can use to reveal the architecture of the ice-covered craton that we cannot see directly. Scientist at Work: Rocks, Zircon Zapping and a Big Shrimp 2011-01-07T21:02:35Z The researchers measured the magnetic strength of certain rocks found in the Kaapvaal craton of South Africa, a geologic region known to date back more than 3 billion years. Geophysicists Push Age of Earth's Magnetic Field Back 250 Million Years 2010-03-04T19:28:00Z These geologic units overlie the craton we want to study and so don’t tell us very much. Scientist at Work: Rocks, Zircon Zapping and a Big Shrimp 2011-01-07T21:02:35Z Near faster ice streams, like Byrd Glacier, we found a rich assortment of igneous and metamorphic rocks, probably eroded from the upstream craton, even though the local nunatak geology exposes only Beacon and Ferrar. Scientist at Work: Rocks, Zircon Zapping and a Big Shrimp 2011-01-07T21:02:35Z |
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