On the Jurassic the zone of the east of Regensburg (mostly on the Tegernheim Gorge) is well known, and shows constant changes and evolution.Meyer, R. K., & Schmidt-Kaler, H. (1995). Fazieswandel und Probleme der Stratigraphie im Obermalm (Tithon) zwischen Solnhofen und Neuburg/D.(Bayern). Institut für Geologie der Universität Erlangen-Nürnberg.Franziska Maier (2010): Geologie der Tegernheimer Schlucht [Geology of the Tegernheim Gorge]. Heimat- und Geschichtsverein Tegernheim. Available at:https://www.heimatforschung-regensburg.de/2649 On the lower jurassic (Lias) a Sea Wedge pushed from the north into the area of Regensburg and formed a Lagoon in which sands and an Iron Ore facies near the coast were deposited ("Keilbergsandstein" and "Arietitessandstein" mostly on the Hettangian, Sinemurian and its maximum extension on the Toarcian Epsilonkalksandstein). Towards the Toarcian the sea gradually advanced to the southeast (Keilberg to the Danube outcrops), so the marine influence in Regensburg increased until the Bifrons Substage of the Toarcian, where the sandstones return and cover all the deposits. It is even more difficult to judge the distance from the coast than in the case of the marine (Hettangian) Angulate Sandstone, which strikes a very broad band as the edge facies of the predominantly clayey angulate strata preserved in Upper Franconia. The Coast probably developed in the direction of the Bohemian-Vindelician highlands, but according to the sandy and/or oolithic development of the upper Liassic facies there is not any superficial guarantee of deposits really close to the coast. The only deposit that shows a proper semiterrestrial derivation is the Calcareous "White Epsilonsandstein". During mostly of the deposition, as with the Angulate sandstone, the beach may have been many kilometers east of today's Paleozoic Massifs, with recovering of nearshore, backshore and breaker zone deposits on the 4 last levels of the formation.
