adj. Steep, like a precipice; as, a precipitous cliff or mountain. adj. Headlong; as, precipitous fall. adj. Hasty; rash; quick; sudden; precipitate; as, precipitous attempts. from the GNU version of the Collaborative International Dictionary of English. adj. Steep, like a precipice. adj. Headlong. adj. Hasty; rash; quick; sudden; precipitate.
A'a' lava flow burying a road on Etna (Oct. 2002). Brief explanation: A'a' lava is the most common appearance type of lava flows that cool down forming fragmented, rough, sometimes spiny, or blocky surfaces.
Lava: The term used for magma once it has erupted onto the Earth's surface. Molten rock that erupts from a vent or fissure. Lava flow: Stream of molten rock that erupts relatively non-explosively from a volcano and moves slowly downslope.An outpouring of lava onto the land surface from a vent or fissure.Also, a solidified tongue-like or sheet-like body formed by outpouring lava.olten rock that erupts from a vent or fissure. Lava flow: Stream of molten rock that erupts relatively non-explosively from a volcano and moves slowly downslope. An outpouring of lava onto the land surface from a vent or fissure. Also, a solidified tongue-like or sheet-like body formed by outpouring lava.