IGNEOUS PETROLOGY (TYPES OF VOLCANOES)

Question 1

?BROAD, GENTRLY SLOPING (2-19 deg) that cover hundreds to thousands of square kilomteres with ?shape resembling that of the defensive shields used by ancient warriors

Answer 1

Shield

Question 2

?Relatively Small, Usually encompassing areas less than 20 sq.km. w/ heights typically of less than 500 m.
?Steep Sided conical features composed of Tephra
?One Shot Volcanoes

Answer 2

Pyroclastic/Monogenetic Cones

Question 3

Predominantly composed of Vesicular Basaltic Material

Answer 3

Scoria Cones

Question 4

Consistinf of fragments ranging from ash, Lapilli to Bombs of varioys composition

Answer 4

Cinder Cones

Question 5

?Majestic cone-shaped mountains encompassing tens to hundres of square kilometers in area with moderate slopes
?Consists of alternating layer of Pyroclastic debris and lava flows giving it a distinctly stratifield layer

Answer 5

Composite Volcanoes/Stratovolcanoes

Question 6

?Steep sided blister or mound like forms that occurs within volcanic craters
?Inflated areas generate by the accumulation due to repeated viscous lava extrusion often glassy, block, dacitic, rhyotlitic, trachytic compositions

Answer 6

Volcanic Domes

Question 7

Caldera?Large crater of >2km in diameter
?formed by long periods of explosive eruptions
?Can cause Major Climactic change, crash of civlization

Answer 7

Caldera