Vocabulary
What is the depression found at the top of most volcanic cones called?
What is a crater
Are sills and dikes a product of intrusive or extrusive volcanism?
What is intrusive
What is a volcano called when it has no historical record of eruption and shows no seismic indications of activity?
What is extinct
What are the tiny, angular, glassy fragments called?
What is ash
A volcano begins to form when magma forces its way to the surface and breaks through, forming a ______.
What is a vent
Where does pillow lava form?
What is underwater
What type of rock are volcanoes made of?
What is igneous rock
Batholiths and laccoliths are both types of what?
What are plutons
The eruption of _______ was the largest volcanic event in recorded history.
What is Mount Tambora
What is the nickname for the Circum-Pacific volcanic belt?
What is the "Ring of Fire"
What is a layer of loose pyroclastic materials and ash covering the ground called?
What is tephra
What name did the term "volcano" originally come from?
What is the name for a Roman god
The viscosity of lava depends mainly on its what?
What is its silica content
A volcano that emits mostly lava in quiet eruptions is called what?
What is a shield volcano
A volcano that emits mostly cinder, ash and bombs is called?
What is a cinder cone
What is a mudslide caused by a volcano called?
What is a lahar
What are two intrusive structures that are known for running horizontal and vertical?
What are sills and dikes
A volcano that emits lava and solid debris in alternately quiet and explosive erosions is called what?
What is a stratovolcano
What is a rapid downhill movement of hot, solid, volcanic particles suspended in steam called?
What is a pyroclastic flow
Organize the following from smallest to largest:
Cinder, ash, bomb
What are widespread, thick layers of lava covering millions of square miles called?
What are flood basalts
What is the largest type of pluton?
What is a batholith
What are the 3 things that a volcano's VEI is based on?
What is amount of tephra, height of eruption cloud, and descriptive estimate of explosion
Which volcanic structure takes up the most land area?
What is a shield volcano
Mineral terraces are often associated with what?
What are hot springs