Extrusive

If the crystallization process occurs at the Earth's surface, the rocks created are called extrusive igneous rocks. ❋ Unknown (2007)

Geologically, the Plateau is composed of Quaternary extrusive rocks, mostly rhyolite, basalt, and tuff. ❋ Unknown (2009)

The mountain ranges are a geologic mix of faulted limestone reefs, volcanoes and associated basalt, rhyolite, and tuff extrusive rocks. ❋ Unknown (2009)

Its mix of granitic, sedimentary, metamorphic, and extrusive rocks contrasts with the predominantly volcanic rocks of the Cascades (4). ❋ Unknown (2009)

The islands are of volcanic origin associated with crustal rifting with basic intrusive and acid extrusive igneous rock overlying Cretaceous sandstones and surrounded by limestones and alluvial plains. ❋ Unknown (2008)

Besides the dyke swarms, the northern section is composed mainly of serpentinised peridotite and gabbro masses, although there are small areas of extrusive volcanic rocks. ❋ Unknown (2008)

It has a variety of features: several lateral craters, shield volcanoes, scoriae and lava cones, extrusive domes and huge detached rocks. ❋ Unknown (2008)

Figure 1f shows another puzzling inclusion type found in quartz from intrusive and extrusive units of the Pine Grove system of Utah (Keith et al. 1986). ❋ Unknown (2008)

Pumice is a type of extrusive volcanic rock, produced when lava with a very high content of water and gases (together these are called volatiles) is extruded (or thrown out of) a volcano. ❋ Unknown (2008)

The Dry, Partly Wooded Mountains ecoregion is largely underlain by sedimentary and extrusive rocks; granitics are less common than in other parts of the Idaho Batholith (16). ❋ Unknown (2008)

They form when magma cools and crystallizes subsurface (intrusive igneous rocks) or lava cools and crystallizes on the surface (extrusive igneous rocks). ❋ Unknown (2008)

The Dissected High Lava Plateau ecoregion has alluvial fans, rolling plains, and shear-walled canyons that are cut into extrusive rocks. ❋ Unknown (2008)

The trippy thing is - they probably aren't intrusive, but extrusive - bursting out from our darker inner places you might say id; I might say - Socratically, because that's how I roll - from the appetitive, erotic part of our soul, the part that is most concerned with selfish self-preservation - if baby keeps me from sustaining myself, why should my impulse NOT be to thrust him away? ❋ Unknown (2008)

Granite is an example of an intrusive igneous rock, whereas basalt is an extrusive igneous rock. ❋ Unknown (2008)

Andesite is a common fine-grained extrusive igneous rock that forms from lavas erupted by volcanoes located along continental margins. ❋ Unknown (2007)

Igneous deposits produced by this feature are extrusive in nature. ❋ Unknown (2007)

Materials are also added to continental crust through intrusive and extrusive igneous activity. ❋ Unknown (2007)

Magma that solidifies at the Earth's surface conceives extrusive or volcanic igneous rocks. ❋ Unknown (2007)

This collision results in the folding and faulting of rock, igneous intrusive and extrusive activity, and metamorphism. ❋ Unknown (2007)

Some of these plumes melt through the Earth's solid lithosphere and can produce intrusive igneous features and extrusive igneous features on the surface. ❋ Unknown (2007)