Definitions for upthrow
upheaval, uplift, upthrow, upthrust(noun)
(geology) a rise of land to a higher elevation (as in the process of mountain building)
A fault in which a mass of material has been thrown up from below.
To throw or cast upwards.
To throw up (a mass of material) from below, causing a fault.
To be thrown up from below, causing a fault.
to throw up
see Throw, n., 9