gyttja


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gyttja

[′yi‚ch+ä]
(geology)
A fresh-water anaerobic mud containing an abundance of organic matter; capable of supporting aerobic life.
References in periodicals archive ?
14]C dates showed that in several cases AMS dates from seeds yielded younger ages than conventional radiocarbon dates from bulk peat, gyttja or wood.
Basal sediments of the cores were inorganic clays or sand and gravel; after the transition to organic sediments at [approximately]10 000 yr BP the sediment changed to fine-detritus gyttja and varied little through the remaining length of the cores.
At most of these sites there is a sharp contact between gyttja and silt or clay at the base of the Younger Dryas, whereas the transition from silt or clay to gyttja near the end of the Younger Dryas spans several centimetres.
14]C-Messungen, die selbst bei Beprobungen der Gyttja in tieferen Schichtenzusammenhange (>3,65 m) in einem breiten Zeitintervall von 1400-200 cal.
The lower sections of sediment cores NS091 and NS092 consist of black gyttja, which changes to light-grey gyttja in the uppermost part of both cores.
Holocene sands, river gravels, silts, gyttja, lacustrine chalk and peat are observed in the vicinity of lakes and in the local depressions.
quien en un articulo de 1933, incluia bajo este generico a: (Barro, Boue, Fango, Gyttja, Limo, Lutum, Moor, Mud, Peat, Sapropel, Schlick, Seaweed, Torf .
The OSL ages of the fluvial deposits confirm the allochthonous bedding of the interglacial gyttja with wood and peat.
The presence of gyttja (high LOI) and relatively low carbon/nitrogen (C/N) isotope ratios are indicative of a productive aquatic environment and are consistent with pre-YD warming recognized elsewhere in Nova Scotia.
Between 315 and 415 cm, the sediment is blackish brown silty gyttja intermittently laminated with fine-grained layers that are lighter in colour.