Fortune Telling Collection - Fortune-telling birth date - What are the types of stones?
What are the types of stones?
Three kinds of rocks
sedimentary rock
It covers 66% of the surface and is the main rock on the surface. Rocks that have been formed before become debris after weathering, or rocks caused by biological remains, and then are eroded, deposited and petrified. This kind of rock is layered, and the first kind is deposited in the lower part, which is older; The higher the level, the newer the times, which is called the law of overlapping layers.
igneous rock
The temperature and pressure inside the earth are very high, and all the components are in a molten state, which is called magma. Igneous rocks, such as basalt and granite, are solidified after magma invades the interior of the crust or flows out of the surface. Igneous rock is the most primitive of all rocks.
metamorphic rock
Primary igneous or sedimentary rocks, influenced by high temperature, high pressure and hydrothermal solution caused by crustal movement or magma intrusion, can change the structure or organization of their original rocks, or make some minerals disappear and produce other new minerals, thus becoming another kind of rock different from the original rocks, called metamorphic rocks, such as marble changed from limestone; Shale metamorphic slate; Quartzite changed from sandstone, etc.
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