extrusive การใช้

• Most are volcanic and extrusive in nature, rather than tectonic.
• Andesite can be considered as the extrusive equivalent of plutonic diorite.
• Granodiorite is felsic to intrusive igneous equivalent of the extrusive igneous dacite.
• The ridges may be volcanotectonic features, composed of extrusives along fissures.
• This extrusive igneous rock is known from only two geological formations worldwide.
• The extrusive igneous rock equivalent of granite is rhyolite.
• Generally speaking, phaneritic implies an intrusive origin; aphanitic an extrusive one.
• Examples of extrusive rocks include basalt, rhyolite, andesite, obsidian and pumice.
• Phonolite is the fine-grained extrusive equivalent.
• Unlike the Sacramento Mountains, the neighboring Sierra Blanca is an extrusive igneous complex.
• Basalt is a dark colored extrusive volcanic rock.
• It used to be found in fissure veins in the extrusive igneous rhyolite rock.
• Some species have extrusive organelles ( trichocysts ).
• Extrusive products include rhyolitic ignimbrites along with basalt, andesite, and rhyolite lava flows.
• Extrusive igneous rock are dominant above on the eastern slope and on the western slope.
• This is an extrusive igneous rock.
• As might be expected, they show structures intermediate between those of extrusive and plutonic rocks.
• Well-known examples of outcropping trap rock include both intrusive sills and extrusive lava flows.
• Hughes Mountain is formed of extrusive rhyolite which joints when it cooled, creating polygonal columns.
• Over large areas extrusive rocks lie in flat undisturbed piles on a Cenozoic surface of moderate relief.