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Malacofauna on coal - ash settling basins comparison of a functional basin to a basin abandoned for 26 years

Pech P., Fric Z. F.

Environment Protection Engineering

2013

Vol. 39, nr 3

73--85

A composition of snail fauna in a functional coal-ash settling basin has been compared to that of a partly reclaimed coal-ash settling basin which had been abandoned for 26 years, using a nature reserve as a control. A total of 24 molluscan species were found at the control site, 21 species in the internal area of the abandoned settling basin and six species in the internal area of the functional settling basin. Numerous and relatively diverse malacofauna have become established on the abandoned coal ash settling basin, consisting mainly of high populations of a low number of widespread species.

ESR ages of three lithuanian mid-late pleistocene interglacials methodical and stratigraphical approach

Gaigalas A., Molodkov A.

Geochronometria

2002

Vol. 21

57-64

The electron spin resonance (ESR) dating was used for freshwater mollusc fossils taken from interglacial deposits at the Gailiunai and Neravai sites (Butenai/Holsteinian In-terglacial), Valakampiai site (Snaigupele/Drente-Warthe Interglacial), Jonionys and Netiesos sites (Merkine/Eemian Interglacial) in Lithuania. Freshwater mollusc samples from the Butenai/Holsteinian and Merkine/Eemian Interglacials estimated by ESR yielded different ages: Butenai O 455.0 to 307.0 ka and Merkine O 112.5 to 101.5 ka BP. Two ESR dates determined for Snaigupëlë Interglacial deposits suggest an average age of about 113.0 ka. This is therefore younger than expected from the palynological data, and it places Snaigupëlë into the interglacial stage, possibly assigned to the MIS 5d that can likely be correlated with the Merkine/Eemian Interglacial (s.l.). Thus, further studies of the deposits and additional ESR dates are needed to make sure that the Snaigupele bed is really much younger than expected (about 200 ka) in all recognized sites in different parts of Lithuania.