Please Define the Following Key Terms

question 31

Essay

Please define the following key terms. Show Who? What? Where? When? Why Important?
-elliptical

---

Definitions:

Fissure

A long, narrow opening or crack, especially one in the ground or in rock formations.

Eruption Column

A rising column of hot gases, tephra, and rock fragments that erupts high into the atmosphere.

Pyroclastic Flow

A fast-moving cloud of hot volcanic gases, ash, pumice, and rock fragments that generally travel down the flanks of a volcano; synonym: ash flow.

Volcanic Dome

A round-shaped mound formed over a volcanic vent by the slow eruption of viscous lava.