Definition of horst in US English:

horst

noun

Geology
  • A raised elongated block of the earth's crust lying between two faults.

    • ‘The area is characterized by a series of low-relief Jurassic horsts and graben.’
    • ‘These faults bound horsts, grabens and tilted blocks.’
    • ‘Thus the Coastal Ranges take on the appearance of an uplifted horst, bounded, particularly to the east, by normal faults.’
    • ‘The main effect of the orogeny in southeastern Utah was to uplift the Uncompahgre High, a horst composed of Precambrian strata, which is bound on its southwestern flank by a major reverse fault.’
    • ‘A thinner series of these rocks occurs on top of horsts of Jurassic rocks.’

Origin

Late 19th century: from German Horst ‘heap’.

Pronunciation

horst

/hôrst/