basalt

«basalt» in Mova's school dictionary: A hard, dark grey or black rock made when hot lava from a… — its meaning for a pupil, its sense in the lessons and examples, with 1 sentence of Mova's corpora that use it.

part of speech

noun (basalt)

meaning for a pupil

1) A hard, dark grey or black rock made when hot lava from a volcano cools quickly. tree →

2) (adjective use) Made of this rock: basalt columns. tree →

sense in the lessons

In science lessons on rocks, basalt is a classic igneous rock; much of the ocean floor is basalt. Famous basalt places include the Giant's Causeway in Northern Ireland with its six-sided columns. Phrases: basalt rock, basalt columns, basalt lava.

examples

• Basalt forms when lava cools quickly. tree →
• The Giant's Causeway is made of thousands of basalt columns. tree →
• Basalt is dark and very hard. tree →
• Most of the ocean floor is made of basalt. tree →
• We sorted the rocks: granite, chalk and basalt. tree →
• Many columns have six sides, like hexagons. tree →

note

Uncountable. Say BAS-awlt or buh-SAWLT. Basalt is igneous (made from melted rock), unlike chalk or sandstone, which are sedimentary. Basalt has tiny crystals because it cooled fast; granite has big crystals because it cooled slowly.

In the corpora

• Basalt is a dark, fine-grained igneous rock made from runny lava and is the most common rock of the ocean floor.

Trees and pragmatics

Every meaning and example of «basalt» parsed by Mova, each sentence with its dependency tree and frames.