Gabbro
Gabbro ( /ˈɡæbroʊ/) is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is chemically equivalent to rapid-cooling, fine-grained basalt. Much of the Earth's oceanic crust is made of gabbro, formed at mid-ocean ridges. Gabbro is also found as plutons associated with continental volcanism. Due to its variant nature, the term "gabbro" may be applied loosely to a wide range of intrusive rocks, many of which are merely "gabbroic".
Words
This table shows the example usage of word lists for keywords extraction from the text above.
Word | Word Frequency | Number of Articles | Relevance |
---|---|---|---|
gabbro | 6 | 117 | 0.702 |
gabbroic | 2 | 10 | 0.288 |
coarse-grained | 2 | 98 | 0.238 |