The Collaborative International Dictionary
Downthrow
Downthrow \Down"throw`\, n. (Geol.) The sudden drop or depression of the strata of rocks on one side of a fault. See Throw, n.
Wiktionary
downthrow
n. (context geology English) A depression of the strata on one side of a fault
Usage examples of "downthrow".
Ramsay has published an account of a downthrow in Anglesea of 2300 feet.
It is most true the Prince my brother practised with our enemies the downthrow of our fortunes, breaking open, had he but known it, the gate of destruction for himself and us, that night when our banquet was turned by him to a battle and our winey mirths to bloody rages.