lava -- Any molten material that is extrusive or volcanic, or the rock that forms from a molten extrusive.
limestone -- A carbonate sedimentary rock composed of more than 50 percent of the mineral calcium carbonate (CaCO3).
lava Molten rock that flows at the Earth's surface.
lava dome A steep-sided rounded extrusion of highly viscous lava squeezed out from a volcano and forming a dome-shaped or bulbous mass above and around the volcanic vent.
Lava flows down the sides of Etna were common.
Again, at night spectacular scenes such as this one showing large blobs of lava being tossed from Etna that make a fireworks-like arcuate pattern ...
Basaltic lava flows often display columnar jointing as a result of contraction forces causing cracks as the lava cools. The extensive crack networks that develop often produce hexagonal columns of lava.
The trial, with the Lava/Magma software from PGS, has demonstrated that it is effectively possible to implement this approach, and to achieve in this manner open, easy and integrated access to data from different organizations.
Shield Volcano Volcano created from alternate layers of lava flows. Shield volcanoes are slightly sloping having a gradient between 6 and 12°. Their height can be as high as 9000 meters.
Lava:
Molten rock material on Earth's surface.
Lava Tube:
A tunnel below the surface of a solidified lava flow, formed when the exterior portions of the flow solidify and the molten internal material is drained away.
Leaching: ...
They are actually vast ancient basaltic lava flows, many of which filled the topographic depressions associated with large impact basins (Oceanus Procellarum is a major exception in that it does not correspond to any known impact basin).
The result is a shapefile with two features for the cinder cone and lava flow. Save the resulting theme as a shapefile on the shared disk. Give it a unique name.
Followers of Hutton were known as plutonists because they believed that some rocks were formed by vulcanism which is the deposition of lava from volcanoes, as opposed to the neptunists, ...
volcano
A volcano is a mountainous vent in the Earth's crust. When a volcano erupts, it spews out lava, ashes, and hot gases from deep inside the Earth.
waterfall
When a river falls off steeply, there is a waterfall.
range, and section information); (5) hypsography, including contours and supplemental spot elevation; (6) vegetative surface cover, including woods, scrubs, orchards, vineyards, and marshes and swamps; (7) nonvegetative features including lava, sand, ...
Coulee:
A dry canyon eroded by Pleistocene floods that cut into the lava beds of the Columbia Plateau in the western United States.
Non-vegetative features - Glacial moraine, lava, sand, and gravel
Survey control and markers - Horizontal and vertical monuments (third order or better)
Manmade features - Cultural features, such as building, not collected in other data categories ...
Two mid-infrared bands are used for geological studies and one for collecting imagery at night and identifying hot objects, such as forest fires, lava flows, emissions from smoke stacks, new construction, and soil use.
 See also: Surface, Region, Cover, Area, Feature
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