Svirkančiai outcrop is located on the left bank of the River Virvytė, in the Svirkančiai recreational area, in the village of Svirkančiai, Viekšniai Eldership. It is about 14.5 m high and 50 m long. The high slope of the outcrop offers views of the Virvytė valley, and the valley’s characteristic elements, which are the loop of the river, the floodplain and the first terraces, and the island in the bed of the River Virvytė. The geological section of the outcrop provides convincing evidence that at the end of the middle period of the Nemunas, around 30,000 years ago, before the last glacier reached the region, there was a large lake. Pavirvytė Manor The lake was discovered and its contours were determined during geological mapping of the surrounding area. The palaeolake was large, about 77 square kilometres, and its existence is important for the reconstruction of the climatostratigraphic events of the entire NordicBaltic region, as the palaeogeography of the Middle Rhine period has been interpreted in many different ways and by different scholars. For example, the continental ice sheet is said to have covered parts of Poland and Denmark during this period, with tongues reaching into western Lithuania and Latvia. Research on the Svirkančiai and Purviai outcrops shows that the Venta area and adjacent lands were covered by a lakerich forest tundra, which could not have been near a glacier.
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