Volcanoes

Front 1

Batholiths

Back 1

Largest intrusive igneous rock body that forms when magma being forced upward towards Earth's crust cools slowly and solidifies underground

Front 2

Caldera

Back 2

Large circular-shape 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

Volano built by alternating explosive and quiet interruptions tha produce layers of tephra and lava; found mostly where Earth's plates come together and one plate sinks below the other

Front 5

Crater

Back 5

Steep-walled depression around a volcanoes 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 result of an unusual hot area at the boundary between Earth's mantle and core that forms volcanoes when melted rock is forced upward and breaks through the crust

Front 8

Shield volcano

Back 8

Broad gently sloping volcano formed by quiet eruptions of basaltic lava

Front 9

Sill

Back 9

Igneos rock feature formed when magma squeezed into a horizontal crack and hardens underground

Front 10

Tephra

Back 10

Bits of rock or solidified lava dropped from the air during an explosive volcanic eruption; ranges in size from volcanic ash to volcanic mobs and blocks

Front 11

Vent

Back 11

Opening where magma is forced up and floss out onto Earth's surface as lava, forming a volcano

Front 12

Volcanic neck

Back 12

Solid igneous core of a volcano left behind after the softer cone had eroded

Front 13

Volcano

Back 13

Ppening in Earth's surface tha erupts sulfurous gases, ash, and lava, can form at Earth's plate boundaries where plates move apart, together, and at hot spots