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Definitioner
Substantiv
- (volcanology) A form of lava flow associated with Hawaiian-type volcanoes, consisting of basaltic rock, usually dark-colored with a jagged and loose, clinkery surface. Compare pahoehoe.
- Always afloat
- Equal parts
Exempel
- We...saw ‘pahoihoi’ or solid lava forming, and also ‘aa’ or clinkers.
- The second form of the lavas is called by the natives a-a, and its contrast with pahoehoe is about the greatest imaginable. It consists mainly of clinkers sometimes detached, sometimes partially agglutinated together with a bristling array of sharp, jagged, angular fragments.
- Cooling and solidification frequently takes a different course [...] in lava flows, producing the clinker-like ‘aa’ lava.
- A'a is thick, sticky lava which forms jagged, chunky rock when it cools.
- I overheard a geologist say that a good pair of boots can be rasped to bits on a‘a in a couple of months.
Böjningsformer