geohazards Flashcards
curved tree trunks are usuallt an indication of what kind of mass movement?
creep or soilfluction
what increases the risk of mass movement?
flooding the sediment with water to the spoint of saturation
what is not a product of effusive, Hawaiian-type eruptions?
rhyolite domes
where is the largest mountain on the solar syatem, Olympus Mons?
Mars
name 3 activities that comprise important ways to assess the warning signals and predict a volcanic eruption?
noting changes in gas and steam emission, monitoring earthquake activity and examining the shape of the volcano over time
effusive eruptions occur when magma is…?
low viscosity
an explosive subsea eruption involving a lot of steam and fountains of wet ash is called..?
Surtseyan
undercutting of a sea side cliff will most likely cause what kind of mass movement?
rock fall
hot, thin, runny lava flows with low silica content are typically…?
basaltic
a mudflow created by the mixing of volcanic ash with meteroic water or melting snow and ice is called…?
a lahar
what are underwater avalanches of suspended sedmients called?
turbidity currents
what type of grains are going to have the steepest angle of repose when piled?
coarse, angular, and dry
what type of volcansism is yellowstine an example of?
a continental hot spot
what is a caldera?
a large circular depression created by the collapse of the volcano into the drained magma chamber
a rock slide into a reservoir triggered catastrophic flooding of the landscape below which dam?
Vajont, Italy
