The Humber Gap is a term for the geographic gap between the roughly north-south running line of hills formed by the Yorkshire Wolds and the Lincolnshire Wolds, formed by the west-east running Humber estuary.
In the geological past the gap has formed part of an ice barrier due to glaciers during the ice age resulting in damming and formation of a 'Humber Lake', and also forms a geological division.
- Humberhead Levels: very heavily silted area formed west of the gap as a result of the damming of the gap, and subsequent lake formation
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