GEOLOGY

Detailed explanation-1: -A dike is a vertical or near vertical intrusive igneous rock body that cuts across rock beds. They frequently form from explosive eruptions that crack the area around a volcano with the magma filling the cracks forming a dike.

Detailed explanation-2: -Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth’s surface. These are the rocks that form at erupting volcanoes and oozing fissures.

Detailed explanation-3: -Dikes form when magma forces itself across rock layers and hardens. Sills form when magma squeezes between horizontal layers of rock. Batholiths are masses of rocks formed when a large body of magma cools inside the crust.

Detailed explanation-4: -Lava cools to form volcanic rock as well as volcanic glass. Magma can also extrude into Earth’s atmosphere as part of a violent volcanic explosion. This magma solidifies in the air to form volcanic rock called tephra. In the atmosphere, tephra is more often called volcanic ash.

Detailed explanation-5: -16) dike An igneous rock feature formed when magma is squeezed through a vertical crack that cuts across rock layers and hardens underground.