Uddelermeer

Uddelermeer is a natural lake located near the village of Uddel in the province of Gelderland, Netherlands.^[4] It is classified as a pingo ruin,^[5] formed during the last ice age by the collapse of a periglacial ice lens.^[6] The lake is the source of the Hierdensche Brook, a stream draining part of the Veluwe.

Uddelermeer
View of Uddelermeer, a lake surrounded by reeds and forest near Uddel, Gelderland, Netherlands.
Location	Uddel, Gelderland, Netherlands
Coordinates	52°14′46″N 5°45′41″E
Type	Crater lake
Primary outflows	Hierdensche Brook
Basin countries	Netherlands
Max. length	300 m (980 ft) [1]
Max. width	200 m (660 ft) [1]
Max. depth	17 m (56 ft) [2]
Surface elevation	24 m (79 ft)[3]
Settlements	Uddel
Location

It is located at an elevation of approximately 24 metres (79 ft) above sea level. The lake has an oval shape with dimensions of roughly 300 by 200 metres (980 ft × 660 ft), and a maximum depth of about 17 metres (56 ft).^[7][8] Sediment cores from the lake bed contain up to 15 metres (49 ft) of gyttja deposits accumulated since the Late Glacial period.^[9]

Archaeological research near the lake has identified human activity associated with the Funnel Beaker culture, including evidence of Neolithic agriculture such as the cultivation of einkorn and emmer wheat.^[10] The name Uttiloch is recorded in a document dated to 792–793 CE, in a donation charter that also mentions Appoldro (present-day Apeldoorn). In local tradition, the lake is associated with accounts that describe Donar striking down a serpent, resulting in the formation of Uddelermeer and Bleeke Meer.^[11]