Assertion: cirrostratus | /r/CreatedBy | the thinning of altostratus
Facets:
value: by the spreading
type: OTHER
Source sentences:
text: Cirrostratus may be produced by the merging of elements of Cirrus or Cirrocumulus (Cs cirromutatus, Cs cirrocumulomutatus), by ice crystals falling from Cirrocumulus (Cs cirrocumulogenitus), by the thinning of Altostratus (Cs altostratomutatus) or by the spreading out of the anvil of a Cumulonimbus (Cs cumulonimbogenitus).