Definition of lopolith in English:

lopolith

noun

Geology
  • A large saucer-shaped intrusion of igneous rock.

    • ‘The lopolith lies with complete discordance upon plutonic and metamorphic rocks of complicated structural and metamorphic history, and is overlain concordantly by rhyodacite tuffs which are intruded by the granophyre and are in turn overlain concordantly by sedimentary rocks.’
    • ‘The ultramafic rocks are probably Jurassic or Cretaceous in age, and constitute a spoon-shaped lopolith with a dunite feeder plug at the east end.’
    • ‘A stockwork of dykes of mainly jotunitic (monzonoritic) composition crosscuts the anorthosite bodies and the lopolith.’

Origin

Early 20th century: from Greek lopas ‘basin’ + -lith.

Pronunciation

lopolith

/ˈlɒpə(ʊ)lɪθ/