| 单词 | extrusive |
| 例句 | These are known as fine-grained extrusive, or volcanic, igneous rocks. An Introduction to Geology 2017-01-01T00:00:00Z What are the reasons that whenever elective and prescribed studies are mixed, an extrusive force regularly appears in the elective? The Teacher Essays and Addresses on Education 2011-07-19T02:00:17.220Z Deposits formed at shallow depths are related to extrusive rocks and to intrusives near the surface. The Economic Aspect of Geology When magmas reach the surface red hot, they form extrusive rocks, such as volcanic rocks. Let's Collect Rocks and Shells In the Republics of France and of America the President is of an extrusive kind. Yet Again When lava is extruded onto the surface, or intruded into shallow fissures near the surface and cools, the resulting igneous rock is called extrusive or volcanic. An Introduction to Geology 2017-01-01T00:00:00Z In some cases, extrusive lava cools so rapidly it does not develop crystals at all. An Introduction to Geology 2017-01-01T00:00:00Z Andesite is a fine crystalline intermediate extrusive rock. An Introduction to Geology 2017-01-01T00:00:00Z Thus, granite is an igneous, intrusive rock; lava is an igneous, extrusive rock. Let's Collect Rocks and Shells They can be intrusive or extrusive—depending on where they cooled off. Let's Collect Rocks and Shells |
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