molten rock that reaches the earth's surface through a volcano
liquefied by heat;
narrow excavation in the ground; ditch
a small valley or
A very common
mineral, hydrated calcium sulfate
composed chiefly of rock fragments of explosive origin, especially
those associated with explosive volcanic eruptions. Volcanic ash, obsidian, and
pumice are examples of pyroclastic materials
cinders: a mixture of ashes and slag
Imagine entering a cave that was once formed by
the explosion of blazing hot lava. Through its melted rock quickly cooling
off, you could even say
you are touching real lava!
Lava caves are found where lava has formed over the surface. Lava
flows down the sides of the volcano. The upper part cools and the lower
part continues to flow below the surface in a tube like form. Due to the
effects of the harden lava above, molten lava is able
to move a long distance underground without it cooling much. Lava Caves may also be formed where lava forms trenches or
gulleys on the surface afterwards the lava roofs over as lava
piles up along the top. In lava tube caves, columns form early when
it is in the cooling process. After its walls have cooled, second
minerals deposits such as gypsum or calcite could
appear. This is caused by chemical reactions.
The formation of these lava tube caves require a special type of
volcanic eruption. The kind of eruption where fluid lava flows down the
sides. The more explosive the volcano the least likely a lava tube cave
will be formed. The most explosive type of volcanic eruption is
pyroclastic which is where rocks, cinders, and
ash eject and don't form these caves. Lava tube caves are homes to many
animals that are adapted to living in complete darkness. Some lava tube
caves even have ancient cave writings & drawings on the walls. These drawings and
writings are great for tourists who visit the caves looking for
historical views and/or information!
Many lava tube caves are found in the western
United States. Lava tube caves played a huge role in the shaping of the Hawaiian
Islands. Here lava has flown over 50 miles from the volcano, amazing
isn't it? They can also be found in the Canary Islands and Galapagos
Islands. Italy, Korea, Kenya, Japan, Mexico and many other volcanic
Looking inside a Lava tube cave.
A pyroclastic volcano that will most likely not create a lava tube.