upthrow

/AH1 P TH R OW0/
noun
  1. 1

    A fault in which a mass of material has been thrown up from below.

verb
  1. 1

    To throw or cast upwards.

  2. 2

    To throw up (a mass of material) from below, causing a fault.

  3. 3

    (of a mass of material) To be thrown up from below, causing a fault.

Source: https://en.wiktionary.org/wiki/upthrow