This means that firm soil becomes semi-liquid, resembling quick sand and causing landslides, mudflows and sand blows.
(This; means; that firm soil becomes semi-liquid, resembling quick sand and causing landslides, mudflows and sand blows) Context(This means,List([0, 10))):(firm soil; becomes; semi-liquid)
This means,List([0, 10))
This firm soil
means becomes
that firm soil becomes semi-liquid, resembling quick sand and causing landslides, mudflows and sand blows
semi-liquid