The nature of its rocks--Igneous, Cambrian, Silurian, Old Red Sandstone, Limestone, Coal--all belonging to the Primary Period. Its rocks英文原著 · 《A Short History of Wales》
--on igneous rocks. --on Lamarck. --on Language. --his Scientific Library. --and the Linnean Society. --and Lyell. --and Malthus. --on Patrick Matthew.英文原著 · 《Darwin and Modern Science》
Columnar basalt. "Comptes Rendus," account of volcanic phenomena in the Atlantic. Concepcion, earthquake of. Concretions in aqueous and igneous rocks compared. -in tuff. -of obsidian. Conglomerate, recent, at St. Coquimbo, curious rock of.英文原著 · 《Volcanic Islands》
And speaking of volcanoes, man, are they a violent, igneous-rock formation.美剧 · 《Friends》
What he believed to be igneous was, in fact, sedimentary.美剧 · 《Friends》
Am I sure? Is basalt a mafic extrusive igneous rock formed By the rapid cooling of magnesium and iron-rich lava?美剧 · 《The Big Bang Theory》