One of the mysteries of the English language finally explained.
Sediment rich in organic matter deposited at the bottom of a eutrophic lake.
- ‘The organic-rich bottom deposits (sapropels or gyttja) are rich in oil-producing organic compounds.’
- ‘Radiocarbon determinations from this type of environment must be analysed with care because of the variable sources of carbon available to the plants which form the gyttja.’
- ‘Incorporation of old carbon into basal gyttja yields ages from bulk samples that are initially about 600 yr too old.’
- ‘All laboratory tests were performed on 19 samples of gyttja and lacustrine chalk taken from the lakelands.’
- ‘The drift gyttja layer in Kalvöviken is synchronous with a short temperature anomaly found in ice cores from Greenland.’
Late 19th century: Swedish, literally ‘mud, ooze’.
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