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A dark mud that is rich in organic nutrients and oxygen and has accumulated at the bottom of a marsh or lake.

[Swedish gyttja, mud, ooze; see gheu- in Indo-European roots.]


(Geological Science) geology a deposit full of nutrients that is found at the bottom of a body of water


(ˈyɪt tʃɑ)

a mud rich in organic matter found at the bottom or near the shore of certain lakes.
[1885–90; < Swedish]
References in periodicals archive ?
It was made on a gyttja bulk sample taken from a borehole which was situated 740 m NW from the Palanga site (Fig.
The percussion coring of the basin further showed that coarse diamicton is overlain by coarse, granite-rich, moderately sorted sediment which, in turn, is overlain by alternating layers of gyttja and wetland sediment.
Algal gyttja deposition initially occurred in the third bog and then was followed by marl deposition.
Organic gyttja and fluvial sediment layers rich in molluscs, identified under peats and 1.
The analysed sediments consisted of brownish gyttja of high organic matter content (loss-of-ignition (LOI) 60-86%) and high porosity (95-98% of water).
In buried conditions patches of peat and gyttja were sealed and preserved up to the present, offering material for radiocarbon dating.
Stratigraphy: Characteristic of limnic sediments, in silt, clay, gyttja, and marl.
Surficial organic deposits are not common on the Ohio till plain; however, three houses in the north Columbus neighborhood of Sharon Woods had to be leveled owing to structural damage from sinking into peat and gyttja.
14]C-Messungen, die selbst bei Beprobungen der Gyttja in tieferen Schichtenzusammenhange (>3,65 m) in einem breiten Zeitintervall von 1400-200 cal.
In the region of TVII and TIX drillings, small water bodies existed in the Late Weichselian, which was confirmed by the presence of lacustrine sediments: at TVII - lacustrine chalk and calcareous gyttja, and in the vicinity of TIX - lacustrine chalk, calcareous gyttja and medium-detritus gyttja.