Definition of foliation in English:

foliation

noun

Geology
  • [mass noun] The process of splitting into thin sheets or laminae.

    • ‘Associated with the folding is an axial planar foliation, which is especially strong at flow unit boundaries.’
    • ‘Both his and our data indicate a main foliation that consistently dips moderately west.’
    • ‘The mylonitic foliation in the hanging wall is subparallel to the thrust plane.’
    • ‘Fine-grained biotite, muscovite and recrystallized quartz grains define the shear foliation.’
    • ‘The data indicate vertical shortening normal to the mylonitic foliation in the granites.’

Pronunciation

foliation

/ˌfəʊlɪˈeɪʃ(ə)n/