This is a list of fine-grained Igneous Rocks:
Andesite
Andesite is a fine-grained, extrusive igneous rock composed mainly of plagioclase with other minerals such as hornblende, pyroxene and biotite.
Andesite is a fine-grained, extrusive igneous rock composed mainly of plagioclase with other minerals such as hornblende, pyroxene and biotite.
Basalt
Basalt is a fine-grained, dark-colored extrusive igneous rock composed mainly of plagioclase and pyroxene.
Basalt is a fine-grained, dark-colored extrusive igneous rock composed mainly of plagioclase and pyroxene.
Rhyolite
Rhyolite is a light-colored, fine-grained, extrusive igneous rock that typically contains quartz and feldspar minerals.
Rhyolite is a light-colored, fine-grained, extrusive igneous rock that typically contains quartz and feldspar minerals.
This is a list of course-grained Igneous Rocks:
Diorite
Diorite is a coarse-grained, intrusive igneous rock that is intermediate in composition between granite and gabbro.
Diorite is a coarse-grained, intrusive igneous rock that is intermediate in composition between granite and gabbro.
Gabbro
Gabbro is a coarse-grained, dark colored, intrusive igneous rock that contains feldspar, augite and sometimes olivine.
Gabbro is a coarse-grained, dark colored, intrusive igneous rock that contains feldspar, augite and sometimes olivine.
Granite
Granite is a coarse-grained, light colored, intrusive igneous rock that contains mainly quartz and feldspar minerals.
Granite is a coarse-grained, light colored, intrusive igneous rock that contains mainly quartz and feldspar minerals.
Pegmatite
Pegmatite is a light-colored, extremely coarse-grained intrusive igneous rock.
Pegmatite is a light-colored, extremely coarse-grained intrusive igneous rock.
Peridotite
Peridotite is a coarse-grained intrusive igneous rock that is composed almost entirely of olivine. It may contain small amounts of amphibole, feldspar, quartz or pyroxene. .
Peridotite is a coarse-grained intrusive igneous rock that is composed almost entirely of olivine. It may contain small amounts of amphibole, feldspar, quartz or pyroxene. .
This is a list of volcanic glass that is an Igneous Rock:
Obsidian
Obsidian is a dark-colored volcanic glass that forms from the very rapid cooling of molten rock material. It cools so rapidly that crystals do not form.
Obsidian is a dark-colored volcanic glass that forms from the very rapid cooling of molten rock material. It cools so rapidly that crystals do not form.
This is a list of vesicular Igneous Rock:
Pumice
Pumice is a light-colored, extremely porous, igneous rock that forms during explosive volcanic eruptions.
Pumice is a light-colored, extremely porous, igneous rock that forms during explosive volcanic eruptions.
Scoria
Scoria is a dark-colored, vesicular, extrusive igneous rock. The vesicles are a result of trapped gas within the melt at the time of solidification. It often forms as a frothy crust on the top of a lava flow or as material ejected from a volcanic vent and solidifying while airborne.
Scoria is a dark-colored, vesicular, extrusive igneous rock. The vesicles are a result of trapped gas within the melt at the time of solidification. It often forms as a frothy crust on the top of a lava flow or as material ejected from a volcanic vent and solidifying while airborne.
This is a list of Igneous rocks that are made of lithified volcanic ash:
Welded Tuff
Welded Tuff is a rock that is composed of materials that were ejected from a volcano, fell to Earth, and then lithified into a rock. It is usually composed mainly of volcanic ash and sometimes contains larger size particles such as cinders.
Welded Tuff is a rock that is composed of materials that were ejected from a volcano, fell to Earth, and then lithified into a rock. It is usually composed mainly of volcanic ash and sometimes contains larger size particles such as cinders.