English: littoral mud
Welsh: llaid morlannol
Subject: Amgylchedd
Welsh definition: Littoral sediment includes habitats of shingle (mobile cobbles and pebbles), gravel, sand and mud or any combination of these which occur in the intertidal zone. Shores of fine particulate sediment, mostly in the silt and clay fraction (particle size less than 0.063 mm in diameter), though sandy mud may contain up to 40% sand (mostly very fine and fine sand).
Notes: Term o system ddosbarthu EUNIS o gynefinoedd morol. LS.LMu. yw’r Cod Cynefin. Mae’r Cyd-bwyllgor Cadwraeth Natur yn defnyddio system arall o gategoreiddio cynefinoedd morol, yn seiliedig ar system ddosbarthu EUNIS. Yn y drefn honno “intertidal mud” yw’r term cyfatebol.