The Eggenburg Basin (also: Eggenburg Bay) is a basin located on the eastern flank of the Waldviertel, through which the Schmida River flows today.
Between the Waldviertel and the Weinviertel, the basin forms a transition zone that is characterised by its biological diversity. In addition to rock formations, dry habitat complexes, wet meadow areas, rivers and streams with gallery forests, the basin is also parts of an important breeding area of the Great Bustard. As a former marine beach or surf, it is also rich in marine deposits from the Lower Miocene; even the Eggenburgian time stage (20 million years ago) was named after it.
The Eggenburg Basin was designated as a separate sub-area in the Nature Conservation Concept of Lower Austria in 1999.
- Nature Conservation Concept Lower Austria Office of the Lower Austrian Provincial Government, Department of Nature Conservation, St. Pölten 2015