Adjective
Found in, or pertaining to, lakes or ponds, or growing in them; as, lacustrine flowers.
Source: Webster's dictionaryDeer were found in this central area, but most fauna were small land animals and fish and other lacustrine animals were found in the lake region. Source: Internet
Note the very fine and flat bedding, common for distal lacustrine deposition. Source: Internet
The sediment could consist of terrigenous material, which originates on land, but may be deposited in either terrestrial, marine, or lacustrine (lake) environments; or of sediments (often biological) originating in the body of water. Source: Internet