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Having a high concentration of hydrogen sulfide and no oxygen. Used of aquatic environments.

[From Latin (Pontus) Euxīnus, the Black Sea (since the deeper waters of the Black Sea constitute such an environment), from Greek (Pontos) Euxeinos, literally, hospitable (sea), perhaps a euphemism for earlier (Pontos) Axeinos, inhospitable (sea) (a-, not + xenos, xeinos, guest, stranger; see xeno-), perhaps a folk etymology of a name of Scythian origin; akin to Avestan axšaēna-, dark-colored, blue.]
References in periodicals archive ?
Conversely, under closed conditions (i.e., euxinic), where dissolved S[O.sup.2.sub.4] is limited, all available dissolved sulfates will be reduced to sulfur.
However, elevated gammacerane/[C.sub.30] 17[alpha], 21[beta]-hopane ratios (Table 2), which have been used to infer marine stratification during source rock deposition [46], and [delta][sup.34]S values as light as -34.5[per thousand] in the Upper Permian Dalong Fm pyrite are consistent with the distribution of aryl isoprenoids, indicating that green and purple sulfur bacteria may have been thriving in stratified euxinic environment.
the Cleveland Basin of the UK, the Posidonia Shale of Germany, the Paris Basin in France) restricted to the Western Europe Euxinic Basin (WEEB) (Gomez and Goy, 2011).
(1998) A euxinic southern North Atlantic Ocean during the Cenomanian/Turonian oceanic anoxic event.
These conditions favour a stagnant euxinic layer for OM deposition, besides, lack of clastic dilution enhances OM deposition.
Based on the high content of redox-sensitive metals and organic matter in the Turisalu Fm., Pukkonen & Rammo (1992) suggested that kerogenous muds in northwestern Estonia were once deposited under a stagnant, stratified and permanently euxinic water column.
[10] as an indicator of persistently euxinic environment during accumulation of the black shale complexes.
Older stratigraphic studies suggest that most of the Barnett Shale accumulated either on a normal marine shelf [14] or in a relatively shallow, starved basin under euxinic conditions [16].
Lewan (1984) showed that V/V+Ni should be greater than 0.5 for organic matter accumulated in euxinic conditions.
Microbial community analysis of euxinic sediments using phospholipid fatty acid biomarkers.
Sulfate reduction and oxic respiration in marine sediments: Implications for organic carbon preservation in euxinic environments.
Rajendran N, Matsuda O, Imamura N, Urushigawa Y (1995) Microbial Community structure analysis of euxinic sediments using phospholipid fatty acid biomarkers.