anatomy of a volcano
type of rock from which the volcano is constructed
igneous
the rapid downhill movement of pyroclastic materials embedded in super-heated steam
pyroclastic flow (glowing avalanche)
billowy type of lava that forms underwater
pillow lava
a glowing avalanche gaseous, liquid, or solid (choose one)
gaseous
two common intrusive volcanic features are the vertically forming dike and the horizontally forming _?_.
sill
tube connecting the surface to the magma chamber below the volcano
vent
a material found in lava that determines its viscosity and speed of flow
silica
molten rock (magma) that reaches the earth's surface
lava
lava gaseous, liquid, or solid
liquid
Batholiths, lacoliths, and stocks
types of plutons
the most identifiable feature of the volcano is the shape of this structure
cone
dangerous mudslides caused by volcanoes
lahars
type of lava that cools to form sharp, angular fragments
'a 'a lava
tephra gaseous, liquid, or solid
solid
a buildup of mineral terraces (travertine) is associated with this landform
hot spring
the depression at the top of most volcanic cones
crater
loose pyroclastic materials and ash that may bury the ground
tephra
this lava has a shiny, but ropy appearance once it cools off
pahoehoe lava
pahoehoe gaseous, liquid, solid
liquid
A spring that forcefully ejects large quantities of hot water and steam in a timely fashion
geyser
an enlarged crater
caldera
The largest volcanic eruption in recorded history
Mount Tambora
molten rock that has formed and remained underground deeply below the earth's crust.
magma
fumarole emissions gaseous, liquid, or solid
gaseous
the eruption of a geyser is a good example of one of these
a hydrothermal circuit