Plain of Bages as seen from the summit of Collbaix (Manresa), in the 1st image looking north, inthe 2nd looking south.
The plain of Bages comprises the wide plains with little hills in the middle of the district. This area is the most in depth carved by the erosion in the region. These plains are often covered by quaternary, younger than one million year sediments. Some of them are fluvial terraces, so sediments that the rivers laid down when they were flowing at higher than present level. These sediments are gravels, sands and silts.