The Solar System in 3-D
- shower-like falling of pyroclastic fragments from an eruption cloud.
disk - a thin, flat, circular object that is shaped
like or forms a ring.
- a dark-colored, fine-grained volcanic rock composed of plagioclase
(over 50%) and pyroxene. Olivine may or may not be present.
- large body of intrusive igneous rock exposed over an area of at least
100 square kilometers.
- a large, more or less circular depression or basin associated with
a volcanic vent. Calderas are believed to result from subsidence or
collapse and may or may not be related to explosive eruptions.
(pl. coronae) - oval-shaped feature on the surface of Venus or Miranda.
Also used to describe the bright, irregular-shaped envelope of ionized
gas around the Sun.
- a fine-grained extrusive rock composed mostly of plagioclase feldspar,
with amphibole and biotite.
- the deposit surrounding an impact crater composed of material thrown
from the crater during its formation.
- an elongate crustal depression bounded by normal faults on its long
sapping - erosion on the surface of a planet resulting
from the seepage of groundwater (subsurface water) onto the surface.
- molten material produced by fusion of target rock during a meteorite
impact, usually found in and around the resulting crater.
- the interior zone of a planet or satellite below the crust and above
the core that behaves plastically.
rocks - rocks formed from preexisting rocks within a
planet's crust by changes in temperature and pressure and by chemical
action of fluids.
channel - a valley on Mars consisting of irregular networks,
thought to have been formed by the sudden release of water.
- a fine-grained volcanic rock composed of quartz, potassium feldspar,
and plagioclase. Rhyolite is the extrusive equivalent of a granite.
- steep slopes produced by erosion or faulting.
- a steep-sided volcano built up of alternating layers of ash and lava
- subsidence of the leading edge of a lithospheric plate into the mantle.
- the process of deformation of planetary materials, for example, faulting
of the crust.
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