What is "lacustrine deposits"

Lacustral \La*cus"tral\, Lacustrine \La*cus"trine\, a. [L. lacus lake: cf. F. lacustral, lacustre.] Found in, or pertaining to, lakes or ponds, or growing in them; as, lacustrine flowers.

Lacustrine deposits (Geol.), the deposits which have been accumulated in fresh-water areas.

Lacustrine dwellings. See Lake dwellings, under Lake.

Lacustrine deposits are sedimentary rock formations which formed in the bottom of ancient lakes. A common characteristic of lacustrine deposits is that a river or stream channel has carried sediment into the basin. Lacustrine deposits form in all lake types including rift graben lakes, oxbow lakes, glacial lakes, and crater lakes. Lacustrine environments, like seas are large bodies of water. They share similar sedimentary deposits which are mainly composed of low energy particle sizes. Lacustrine deposits are typically very well sorted with highly laminated beds of silts, clays, and occasionally carbonates. In regards to geologic time lakes are temporary and once they no longer receive water they dry up and leave a formation.