Definition of gabbroic in US English:

gabbroic

adjective

Geology
  • See gabbro

    • ‘The drilling of nine cored boreholes, including a deep hole to a gabbroic basement, in the vicinity of the Rhyme chert locality has resulted in a major revision of the structure and stratigraphy of the area.’
    • ‘This is based on preservation of original gabbroic textures and occurrence of intergranular coesite in UHP rocks.’
    • ‘The plutons are composed of medium - to coarse-grained, porphyritic quartz monzonite, quartz syenite and granite, together with smaller amounts of equigranular gabbroic and monzonitic rocks.’
    • ‘Of far less importance are occurrences in gneisses and amphibolites, in small plutons derived from syenitic and gabbroic magmas, and in certain contact-metamorphic rocks.’
    • ‘This magmatism is typically of gabbroic to granitic composition and also shows evidence of mixed sedimentary and mantle-like sources.’

Pronunciation

gabbroic

/ɡəˈbrō-ik/