Ieper Group

The Ieper Group is a group of rock strata in the subsurface of northwest Belgium. The group is subdivided into three marine formations, all formed during the Ypresian, a single age of the geologic timescale . Both age and group are named after the West-Flemish town of Ypres, for which the Dutch name is "Ieper".

In the original description of his newly introduced Ypresian stage Dumont did mention neither stratotype nor type locality. He simply referred to the "collines d'Ypres" or Ieper Hills, as the area where the unit is best developed. However, it remains unclear what is meant by this term. The town of Ieper is situated in western Belgium, at the southern end of a small, NW-SE oriented depression above mean sea level), surrounded from north to south by a series of low hills ). Dumont probably envisaged the elevated zones a few km north and east of Ieper , where clay beds have been quarried for brick and tile making for quite a long time.

Wikipedia