Basalt Gabbro Granite Rhyolite

Silicic granite rhyolite intermediate diorite andesite mafic gabbro basalt ultramafic peridotite komatiite combination of texture and composition produces rock name.

Basalt gabbro granite rhyolite.

Mafic magmas crystallize to form relatively simple atomic structures isolated tetrahedra and single chains and therefore flow easily the higher mafic temperatures also contribute to this ease of. Hardness of granite and rhyolite is 6 7. Examples of intrusive igneous rocks are diabase diorite gabbro granite pegmatite and peridotite. Properties of rock is another aspect for granite vs rhyolite.

Granite is made from three commonplace minerals quartz mica and feldspar and when viewed from a distance appear tan pinkish or gray relying at the concentrations and grain sizes of the 3 minerals. Gabbro is a dark colored coarse grained intrusive igneous rock. Some cool so quickly that they form an amorphous glass. Felsic with an aphanitic texture so fine grained that their component mineral crystals are not detectable by the unaided eye.

Trapped deep within the earth magma is authorized to cool slowly. Gabbro obsidian granite and andesite. Classification of common igneous rocks based on texture and composition texture a. Lab 6 igneous rock samples red granite rhyolite diorite gabbro gray granite obsidian andesite basalt rhyolite tuff pumice lab 6 igneous rock samples red granite rhyolite diorite gabbro gray granite obsidian andesite basalt rhyolite tuff pumice lab exercise 2.

Appearance of granite is veined or pebbled and that of rhyolite is banded. It may have any texture from glassy aphanitic porphyritic and by the orientation of small crystals reflecting the lava flow. Another reason is the internal crystalline structure of the silicate minerals. Granite is available in black grey orange pink white colors whereas rhyolite is available in grey white light black colors.

It is composed predominantly of quartz k feldspar and biotite. Therefore more basalt than gabbro and more granite than rhyolite. Examples of intrusive rocks are granite and gabbro. Also gabbro has no alkali feldspar only plagioclase feldspar with a high calcium content.

Magma volcanism and igneous rocks every igneous rock has a story to tell that geologists can unravel by considering the rock s. It is composed predominantly of quartz k feldspar and biotite. Extrusive igneous rocks erupt onto the surface where they cool quickly to form small crystals. Gabbro is a dark colored igneous rock that is considered to be the plutonic equivalent of basalt.

Rhyolite is very closely related to granite. Unlike granite gabbro is low in silica and has no quartz. These rocks include andesite basalt dacite obsidian pumice rhyolite scoria and tuff. Rhyolite is extrusive equivalent of granite magma.

Gabbro is very similar to basalt in its mineral make up.