Science Vocab Ch12

Front 1

Batholith

Back 1

largest intrusive igneous rock body that forms when magma being forced upward toward Earths crust, cools down slowly and solidfies underground.

Front 2

Caldera

Back 2

large, circular-shaped opening formed when the top of a volcano collapses.

Front 3

Cinder Cone Volcano

Back 3

steep sided loosely packed volcano formed when tephra falls to the ground.

Front 4

Composite Volcano

Back 4

volcano built by alternating explosive and quiet eruptions that produced layers of tephra and lava; found mostly were earths plates come together and one plate sinks below the other.

Front 5

Crater

Back 5

steep wall depression around a volcano vent.

Front 6

Dike

Back 6

igneous rock feature formed when magma is squeezed into a vertical crack that cuts across rock layers and hardens underground.

Front 7

Hot Spot

Back 7

the results of an unusually hot area at between the boundrie between Earths Mantle and core that forms volcanoes when melted rock is formed upward and breaks throughout the crust.

Front 8

Shield Volcano

Back 8

broad gently sloping volcano formed by quiet eruptions of basaltic lava.

Front 9

Sill

Back 9

igneous rock feature formed when magma is squeezed into a horizontil crack between layers of rock and hardens underground.

Front 10

Tephra

Back 10

bits of rock or solidfied lava dropped from the air during explosive volcanic eruptions; ranges in size from volcanic ash to volcanic bombs and rocks.

Front 11

Vent

Back 11

opening were magma is forced up and flows out onto earths surface as lava is forming a volcano.

Front 12

Volcanic Neck

Back 12

solid igneous core of a volcano left behind after the softer cone has been eroded.

Front 13

Volcano

Back 13

opening in earths surface that erupts sulfurous gases, ash ans lava; can form at earths plate boudries were plates move apart or together and at hot spots.