In geology, the crust is the outermost solid shell of a planet, dwarf planet, or natural satellite. It is usually distinguished from the underlying mantle by its chemical makeup; however, in the case of icy satellites, it may be defined based on its phase (solid crust vs. liquid mantle).

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The meaning of CRUST is the hardened exterior or surface part of bread. How to use crust in a sentence.

2023年8月1日 · The crust is the Earth’s outermost layer and it’s where we live. It has an irregular thickness, varying from about 5 km beneath the oceans (oceanic crust) to about 30 km beneath the continents (continental crust). The crust mainly consists of lighter rocks, such as basalt in the oceanic crust and granite in the continental crust.

2024年4月25日 · Dynamic geologic forces created Earth’s crust, and the crust continues to be shaped by the planet’s movement and energy. Today, tectonic activity is responsible for the formation (and destruction) of crustal materials. Earth’s crust is divided into two types: oceanic crust and continental crust.

Earth cutaway from the core to the exosphere. The Earth's crust is the Earth's hard outer layer. It is less than 1% of Earth's volume.The crust is made up of different types of rocks: igneous, metamorphic, and sedimentary rocks. Below the crust is the mantle.The crust and the upper mantle make up the lithosphere.The lithosphere is made of tectonic plates, which move very …

Plates in the crust of Earth. Earth's crust is its thick outer shell of rock, referring to less than one percent of the planet's radius and volume.It is the top component of the lithosphere, a solidified division of Earth's layers that includes the crust and the upper part of the mantle. [1] The lithosphere is broken into tectonic plates whose motion allows heat to escape the interior of …

2024年12月14日 · The crust is the outermost layer, composed of solid rock and soil. It’s a relatively thin shell compared to the mantle and core, which lie beneath it. Think of an apple; the skin represents the crust, while the fleshy part and core represent the …

A crust is a hard layer of something, especially on top of a softer or wetter substance. As the water evaporates, a crust of salt is left on the surface of the soil. Synonyms: layer , covering , coating , incrustation More Synonyms of crust

Graduates in geology, geochemistry and geophysics will find this book a valuable reference text. The book begins by describing the known composition of the present upper crust, then deals with possible compositions for the total crust and the inferred composition of the lower crust.