gyttja

[ yit-chah ]
/ ˈyɪt tʃɑ /

noun Geology.

a mud rich in organic matter, found at the bottom or near the shore of certain lakes.

Origin of gyttja

1885–90; < Swedish, akin to gjuta to pour
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019