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# 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 →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/B/basalt/#m1)

2) (adjective use) Made of this rock: basalt columns. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/B/basalt/#m2)

### 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 →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/B/basalt/#x1)
- The Giant's Causeway is made of thousands of basalt columns. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/B/basalt/#x2)
- Basalt is dark and very hard. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/B/basalt/#x3)
- Most of the ocean floor is made of basalt. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/B/basalt/#x4)
- We sorted the rocks: granite, chalk and basalt. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/B/basalt/#x5)
- Many columns have six sides, like hexagons. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/B/basalt/#x6)

### 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.](https://md.mova.elamur.ai/free/en/corpora/school/geography/48-igneous-rocks-and-the-rock-cycle/9/)

### Trees and pragmatics

[Every meaning and example of «basalt» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/B/basalt/), each sentence with its dependency tree and frames.