Rhyolite Granite Magma Oceanic Crust

Granite obsidian pumice basalt.

Rhyolite granite magma oceanic crust.

When the magma solidifies inside the earth s crust it cools slowly forming coarse textured rocks inclusive of granite gabbro or diorite. It may have any texture from glassy aphanitic porphyritic and by the orientation of small crystals reflecting the lava flow. Oceanic crust is hydrothermally altered causing addition of quartz and sodium. The oceanic crust is most like.

Are rich in iron and magnesium. The continental crust is most like. Geologists regard basaltic magma hawaiian lava for example as the result of the partial melting of ultramafic rock in the. It has a higher melting point.

Rhyolite is an extrusive silica rich igneous rock. Rhyolite has a similar composition and appearance to granite. It is composed predominantly of quartz k feldspar and biotite. The rocks that melt to make magma are composed of many minerals not all of which melt under the same conditions.

Igneous rock most abundant in the the oceanic crust. Rhyolite is extrusive equivalent of granite magma. Rhyolite extrusive igneous rock that is the volcanic equivalent of granite. Making up the entire ocean crust and much of continental crust.

Crystallize at a higher temperature than do silicic minerals. The last rock type to crystallize from magma as the temperature falls is. Dacitic magma is formed by the subduction of young oceanic crust under a thick felsic continental plate. Granite rhyolite basalt gabbro.

Basaltic magma is hotter than rhyolitic magma because. However rhyolite forms as a result of a violent volcanic eruption while granite forms when magma solidifies beneath the earth s surface. Granite rhyolite basalt gabbro. Typical intrusive formations are batholiths stocks laccoliths sills and dikes.

Most rhyolites are porphyritic indicating that crystallization began prior to extrusion. Form rhyolite and granite. 1992 oceanic islands from reunion island indian ocean. Concerns the order of crystallization of minerals from magma.