Consider the following statements regarding Volcanic Landforms 1 Sill ndash near horizontal bodies o...........

Geography Earth Geology

Consider the following statements regarding Volcanic Landforms.

1.Sill – near horizontal bodies of the intrusive igneous rocks are called sill or sheet, depending on the thickness of the material

2.Dykes - almost perpendicular wall like structure of solidified magma

3. Lacolith - Large dome-shaped intrusive bodies with a level base

How many of the statements given above is/ are correct?

Only One

Only Two

All Three

None

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Explanation:

Sill – near-horizontal bodies of the intrusive igneous rocks are called sill or sheet, depending on the thickness of the material: This statement is correct. Sills are indeed near-horizontal intrusions of magma that are typically parallel to the layering of the existing rock.

Dykes - almost perpendicular wall-like structure of solidified magma: This statement is correct. Dykes are vertical or near-vertical intrusions of magma that cut across the existing rock layers.

Lacolith - Large dome-shaped intrusive bodies with a level base: This statement is correct. Laccoliths are concordant igneous intrusions that form when magma is injected between sedimentary rock layers, causing the overlying rocks to arch upward, creating a dome-like structure with a level base.