2.(Cookery) the baked shell of a pie, tart, etc 3.any hard or stiff outer covering or surface:a crust of ice. 4.(Geological Science) the solid outer shell of the earth, with an average thickness of 30–35 km in continental regions and 5 km beneath the oceans, forming the upper pa...
Define Earth's crust. Earth's crust synonyms, Earth's crust pronunciation, Earth's crust translation, English dictionary definition of Earth's crust. Noun 1. Earth's crust - the outer layer of the Earth crust layer - a relatively thin
This chapter discusses the evolution of the continental crust. The geological observations on rock units of different ages, together with the physical constraints, provide the basis for models of crustal evolution. A mafic-to-felsic compositional progression of magmatic units, the decreasing proportion ...
The dinosaurs, famously, went out with a bang. Geological record discovered in the 1980s suggests that an asteroid impact event may have caused the extinction of the dinosaurs. Something big hit the Earth 65 million years ago and, when the dust had fallen, so had the great reptiles. There ...
英译汉 1. Edison Edison was a genius and his inventions greatly affected the development of modern society. Born in 1847 in Ohio, Thomas Edison attended school for only 3 months. By age 10, Edison had built a science laboratory in the basement of his family’s home and had become an ...
The stress redistribution along the brittle, velocity-weakening, part of the crust triggers the occurrence of other earthquakes, the aftershocks. They follow well established empirical laws that can be put in the form of power laws with quite universal values for the exponents2. In particular, ...
A new calculation of the crustal composition is based on the proportions of upper crust (UC) to felsic lower crust (FLC) to mafic lower crust (MLC) of about 1:0.6:0.4. These proportions are derived from a 3000 km long refraction seismic profile through western Europe (EGT) comprising 60%...
TheAmerican Heritage Dictionarydefinescommunityasa group of people living in the same locality and under the same government.Or I should say, that is the first definition. Way down at the sixth definition, the wordssharing, participation, and fellowshipappear. Because our lives can be so enhanced...
1.The scientific study of the origin, history, and structure of the earth. 2.The structure of a specific region of the earth's crust. 3.A book on geology. 4.The scientific study of the origin, history, and structure of the solid matter of a celestial body. ...
Define Continential crust. Continential crust synonyms, Continential crust pronunciation, Continential crust translation, English dictionary definition of Continential crust. n geology that part of the earth's crust that underlies the continents and cont