Klenovka Fm

Khor-Dalnin zone of central Sikhote-Alin uplift. In the interfluve of the Klenovka and Lesnukha rivers, the Kholminka Fm is represented by non-marine deposits designated as the Klenovka unit (Markevich et al., 2000).

Synonym: Klenovka unit (official name on chart)

Lower part of the unit is composed of a basal portion with conglomerates, andesites and their tuffs, but mainly of sandstones with intercalations of andesite tuffs, dacites and lenses of conglomerates with a total thickness of 920 m. Upper part of the unit is composed of silty mudstones, sandstones, lenses and beds of andesites and their tuffs, tuffites and dacites with a total thickness of 1100 m.

Lower part yields fresh-water gastropods Campeloma cf. tani, C. clavilathiformis and Viviparus sp. in the middle part and shallow-marine bivalves Liostrea sp., Amphidonte sp. and “Callista” sp. in the interbed of tuffaceous sandstones (Markevich et al., 2000). Upper part yields fresh-water bivalves Sphaerium [=Lymnocyrena] cyclica, S. cf. anderssoni and fresh-water gastropods Campeloma cf. yinsiensis, C. cf. tani, Viviparus sp. ind. and non-marine bivalve Trigonioides sp. in the uppermost part (Markevich et al., 2000). The range of the Kholminka Formation is based on the ammonite Paragastroplites ex gr. spiekeri, representing a middle Albian index species. Trigoniids and representatives of “Callista” are also known from the middle Albian Luzhki Formation. Non-marine molluscs were also reported from the middle Albian of Southern Primorye (Markevich et al., 2000).