magma travelling through dykes
... that magma travelling through dykes usually solidifies before it gets to the Earth's surface?
... that <b id="mwCFA"><a href="./Volcanic_and_igneous_plumbing_systems" id="mwCFE" rel="mw:WikiLink" title="Volcanic and igneous plumbing systems">magma travelling through dykes</a></b> usually solidifies before it gets to the Earth's surface?