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• a  of rock material; forced out while molten through cracks in the earth's surface

• In the Republics of France and of America the president is of an extrusive kind.

• intrusive

News & Articles

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• AGU Journal Highlights -- Aug. 30, 2013
  ( American Geophysical Union ) Featured in this release are research papers on the following topics: "Parts of Amazon on the verge of forest-to-grassland shift," "Hawaiian Islands formed through extrusive volcanic activity," "Shifts of the Subtropical Shelf Front controlled by atmospheric variations," "Atmosphere's emission fingerprint affected by how clouds are stacked," "Loess landscapes could ...
  Aug. 30, 2013 - EurekAlert!