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Describe the factors that might cause magma to form a laccolith instead of a sill?

A laccolith forms when magma is injected into a horizontal crack in the rock layers, causing the overlying rock to arch upwards. This is influenced by factors such as the viscosity of the magma, the amount of pressure exerted, and the density contrast between the magma and surrounding rock. If the magma is less fluid and exerts greater pressure, it is more likely to form a laccolith instead of a sill, which forms when magma intrudes parallel to the rock layers.


What is a hardened layer of magma called?

A hardened layer of magma is called a lava flow or volcanic rock.


What is rock body made from slow cooling magma and with a mushroom shape?

A laccolith.


What does magma pushed into a thick sill form?

When magma is pushed into a thick sill, it solidifies underground to form a layer of igneous rock called a dike. Dikes typically cut across existing rock layers, creating a discordant intrusion. The rock that forms from the cooling magma in a dike is usually fine-grained due to the rapid cooling process underground.


A laccolith is an example of a?

A laccolith is an example of an igneous intrusion, which is a body of intrusive igneous rock that forms by magma uplifting and pushing overlying rock layers.


How might the landscape above a laccolith look?

it would look like an uplift or dome because the laccolith below is a lens-shaped mass of magma that pushes the rock above it upward


How might the surface landscape above laccolith look?

it would look like an uplift or dome because the laccolith below is a lens-shaped mass of magma that pushes the rock above it upward


How might a surface landscape above laccolith look?

it would look like an uplift or dome because the laccolith below is a lens-shaped mass of magma that pushes the rock above it upward


What is magma in a sill which pushes up to form a rock dome called?

The magma in a sill that pushes up to form a dome-shaped rock structure is called laccolith. Laccoliths form when magma intrudes between layers of sedimentary rock and causes the overlying rocks to arch upwards, resulting in a dome-like structure.


What is an igneous intrusive feature that forms from a lens shaped mass of magma that arches the overlying strata upwards?

Laccolith


What is laccolith an example of?

A concordant (lateral) intrusion of magma (which has a dyke-like feeder and a convex (arching) upper surface.


How might the surface landscape above a laccolith look?

The surface landscape above a laccolith typically appears as a dome or bulge due to the intrusion of magma creating a blister-like formation beneath the Earth's crust. Over time, erosion may expose the laccolith's core, revealing the igneous rock that solidified underground. This can result in unique geological features like mesas or buttes.