
1) Volcanic landform
Found on
https://www.crosswordclues.com/clue/malpaís
[group] Malpaís is a band from Costa Rica. The music of Malpaís is part of the Costa Rica-contemporary compositions work, called by the band `Costarican new song`. The musicians are trying to relate the concept to the early folk and protest folk tradition of Latin America, mixing musical structures of regional and local folk genres such a...
Found on
http://en.wikipedia.org/wiki/Malpaís_(group)
[landform] Malpaís is a term used in the Southwestern United States, Mexico, and other Spanish-speaking regions for a rough and barren landscape that consists of relict and largely uneroded lava fields that exhibit recognizable lava flows, volcanic cones, and other volcanic landforms. This type of volcanic landscape is extremely rough and ...
Found on
http://en.wikipedia.org/wiki/Malpaís_(landform)

• (n.) The rough surface of a congealed lava stream.
Found on
http://thinkexist.com/dictionary/meaning/malpais/
Mal'pais` noun [ Confer Spanish
mal ,
malo , bad, and
país country.]
(Geol.) The rough surface of a congealed lava stream. [ Southwestern U. S.]
Found on
http://www.encyclo.co.uk/webster/M/13

Literally, badland; refers to dark-colored rock, commonly lava, in rough terrain.
Found on
http://www.selectstone.com/architectural-resources/stone-glossary/
No exact match found.