Where lava from a volcanic mountain forcefully, but not ...
Mount Bulusan is the southernmost volcano on Luzon Island ...
A whitish semicircular arc seen opposite the sun in fog. ...
Scotch thistle is a biennial plant with thorny leaves, ...
Popocatepetl is an active volcano, located in the states of ...
A pyroclastic flow (also known scientifically as a ...
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