Danube
"Danube" is an Old European river name derived from a Proto-Indo-European "*dānu". Other river names from the same root include the Dunaj, Dzvina/Daugava, Don, Donets, Dnieper, Dniestr, Dysna, Tana and Tuoni. In Rigvedic Sanskrit, "dānu" means "fluid, drop", in Avestan, the same word means "river". In the Rigveda, "Dānu" once appears as the mother of Vrtra, "a dragon blocking the course of the rivers." The Finnish word for Danube is Tonava, which is most likely derived from the word for the river in Swedish and German, "Donau". Its Sámi name "Deatnu" means "Great River". It is possible that "dānu" in Scythian as in Avestan was a generic word for "river": "Dnieper" and "Dniestr", from "Danapris" and "Danastius", are presumed to continue Scythian "*dānu apara" "far river" and "*dānu nazdya-" "near river", respectively.
Donaustadt
The area of the Donaustadt District was primarily shaped by the river Danube, which, over time, formed terraces. Especially during the Ice Age, frost came through to form large debris dimensions, by the Danube in the Vienna Basin. In the warm phase, in the section following the Danube, gravel terraces formed out in the district area, dividing the near Danube "zone of recent meander" and the higher-lying Prater Terrace. The slightly higher-lying terrace Prater comes from the "Würmeiszeit" (the most recent ice-age); the underlying terrace was created after the Ice Age. For older terraces, the intensive weathering is characteristic, with a layer of loess or clay. On the surface, DonauStadt has of gravel. This is composed of sandy Central and Grobkiesen together, which through the Danube have been deposited. The plattigen stones are usually sandstone from the nearby Vienna. The round Gerölle consist mostly of crystalline rocks such as granite, gneiss, crystal, etc. The granite comes just as the black amphibolite from the Bohemian mass. The greenish-gray gneiss was up from the Central Alps and the Czech mass removed. Further round to oval Kiese consist of limestone and comes from the Northern Limestone Alps. Below the gravel, saturated with groundwater, are sands of the Pannon iums, which were deposited here over 9.7 to 8 million years ago. In several kilometers deep (a few miles), the foothills of the Northern Limestone Alps include shifts from the Mesozoic, which have gas and oil about three kilometers deep (2 miles).