Of lakes, especially in connection with sedimentary deposition. Lacustrine plains result from the in-filling of a lake. Soil parent materials are usually fine grained, well sorted, and often varved. Ground surfaces are level to gently inclined and slightly concave. Landform elements include lakes, playas, some ox-bows, and some lagoons. For lacustrine terraces, see Korotkii et al. (2007) Russ. J. Pacific Geol. 1, 4.