rere tipua
1. (noun) pyroclastic flow.
Ko te rere tipua o te tahepuia, koirā te pahū ake o te tokarewa, ka hū ake he maramara toka, he pungarehu, he haurehu, he toka nui hoki (RP 2009:380). / The pyroclastic flow of lava is the eruption of magma and the ejection of pieces of rock, ash, gas and large rocks.