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日期:2024-04-23
A list of all unique rock types recognized by petrologists. Names of non-rock types and archaic rock types are given as appendices....
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日期:2024-04-24
Volcanic rock (often shortened to volcanics in scientific contexts) is a rock formed from magma erupted from a volcano. In other words, it differs from other igneous rock by being of volcanic origin. Like all rock types, the concept of volcanic rock is ar...
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日期:2024-04-22
VHP Photo Glossary: Volcanic rocks Types of Igneous Rocks An igneous rock is formed by the cooling and crystallization of molten rock. The term igneous is derived from ignius, the Latin word for fire. Scientists have divided igneous rocks into two broad ....
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日期:2024-04-18
Volcanic rocks are igneous rocks that originated from volcanoes. In other words, these are rocks that came out of a volcano during an eruption. For example, basalt rock forms from lava flows, and pumice is often associated with explosive volcanic events. ...
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日期:2024-04-20
Volcanic Rock is the second album for Australian proto-heavy metal band Buffalo, recorded and originally released in 1973 on the Vertigo label. The album was stylistically a much harder, heavier and rawer release than its predecessor (Dead Forever...) – m...
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日期:2024-04-20
Volcanic rock is an igneous rock of volcanic origin. Volcanic rocks are usually fine-grained or aphanitic to glassy in texture. They often contain clasts of other rocks and phenocrysts. Phenocrysts are crystals that are larger than the matrix and are iden...
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日期:2024-04-21
Basalt Basalt is a hard, black volcanic rock with less than about 52 weight percent silica (SiO 2). Because of basalt's low silica content, it has a low viscosity (resistance to flow). Therefore, basaltic lava can flow quickly and easily move >20 km from ...