| 21. | Torfaj�kull last erupted in 1477 and consists of the largest area of silicic extrusive rocks in Iceland.
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| 22. | Over large areas extrusive rocks lie in flat undisturbed piles on a Tertiary surface of moderate relief.
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| 23. | Within the rugged terrain serpentinized peridotite and gabbro are capped with a thin layer of extrusive basalt.
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| 24. | It is commonly produced in volcanic arcs, and in cordilleran extrusive volcanic equivalent rock type is andesite.
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| 25. | Defensive extrusive ectosymbionts of Euplotidium ( Ciliophora ) that contain microtubule-like structures are bacteria related to Verrucomicrobia.
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| 26. | The most common rock type in this area is extrusive igneous group that include basalt, andesite, and rhyolite.
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| 27. | Many of the extrusive rocks and some of the Pseudoleucite is an abundant constituent of many of the igneous rocks.
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| 28. | The degree to which these practices took place was based off the two modes of social death, intrusive and extrusive.
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| 29. | Rhyolite is the same as granite chemically; however it is an extrusive rock, whereas granite is an intrusive rock.
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| 30. | In contrast, an " extrusion " consists of extrusive rock; rock formed above the surface of the crust.
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