flowtop

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English

Etymology

From flow +‎ top.

Pronunciation

Noun

flowtop (plural flowtops)

  1. (geology) The solid crust on a moving lava flow.
    • 2007 September 21, Jaeger et al., "Athabasca Valles, Mars: A Lava-Draped Channel System" in Science 317(5845), page 1710 :
      they formed as gas vented from fixed sources at depth, ripping continuous openings through the moving flowtop.