Rhyolitic magma, high in quartz and feldspar. Forms granite underground, rhyolite above ground.
Magma that reaches the surface can form volcanic mountains. When magma erupts through the Earth's crust, it can create structures such as shield volcanoes, which have broad, gently sloping sides, or stratovolcanoes, which are steep and conical in shape. The type of volcanic mountain formed depends on the viscosity of the magma and the nature of the volcanic activity. Over time, repeated eruptions can build up these mountains significantly.
Volcanic.
Granite is an igneous rock that forms from the cooling and solidification of magma deep within the Earth's crust. This type of magma is typically associated with continental volcanic arcs or intrusions, rather than volcanic eruptions at the surface.
Magma can solidify and cool to form igneous rocks such as granite, basalt, or andesite, depending on the composition and cooling rate of the magma.
Composite or stratovolcanoes typically form along subduction zones. These volcanoes are characterized by their steep-sided profile, explosive eruptions due to the presence of viscous magma, and alternating layers of lava flows and volcanic ash. Subduction zones are where one tectonic plate slides beneath another plate, leading to magma formation and volcanic activity.
Shiprock is comprised of a form of magma known as volcanic breccia.
Magma that reaches the surface can form volcanic mountains. When magma erupts through the Earth's crust, it can create structures such as shield volcanoes, which have broad, gently sloping sides, or stratovolcanoes, which are steep and conical in shape. The type of volcanic mountain formed depends on the viscosity of the magma and the nature of the volcanic activity. Over time, repeated eruptions can build up these mountains significantly.
Volcanic.
Volcanic.
The metamorphosed limestone will most likely be a skarn or marble, both formed from contact with an intruding granitic magma.
Volcanic mountains
The rock which will form will be marble because the limestone undergoes metamorphosis (partial recrystallisation).
When magma cools, it forms igneous rock.
Rocks formed by volcanic activity are called igneous rocks. These rocks form when molten magma cools and solidifies either above or below the Earth's surface. Examples of volcanic igneous rocks include basalt, andesite, and rhyolite.
The silica content and the gas content of magma are two properties that determine what kind of volcano will form. Magma with low silica content and low gas content tends to form effusive, shield volcanoes, while magma with high silica content and high gas content tends to form explosive, stratovolcanoes.
It was lava (volcanic magma) from undersea volcanic vents.
It was lava (volcanic magma) from undersea volcanic vents.