Wehntal

The Wehn valley (native German name: Wehntal) area is situated between the Lägern and Egg mountain chain in the Dielsdorf District of the Canton of Zürich in Switzerland.

During melting of the glacier, Wehntal, the lower Glatttal and Furttal filled about 180,000 to 150,000 years ago with cold glacial lakes.

After another glacier maximum about 140,000 years ago, the ice melted in the last Eemian (interglacial) period back far into the alpine valleys, and great lakes with border union fens filled the former glacial basin.

During the Würm glaciation and again about 45,000 years ago, mammoths and other Ice Age animals lived in the largely silted Wehntal.

In 1994 a groundwater bore in Oberweningen proved that the Wehntal area originally laid at least 130 metres (430 ft) deeper than the present valley floor and had to be caused by glacial erosion.