When glaciers covering more northern latitudes melted at the end of the last ice age, two things happened to create the Solent. Firstly, a great amount of flood water ran into the Solent River and its tributaries, carving the estuary deeper. Secondly, post-glacial rebound after the removal of the weight of ice over Scotland caused the island of Great Britain to tilt about an east–west axis, because isostatic rebound in Scotland and Scandinavia is pulling mantle rock out from under the Netherlands and south England: this is forebulge sinking.
When glaciers covering m,ore northern latitudes melted at the end of the last ice age, two things happened to create the Solent. Firstly a great amount of flood water ran into the Solent River and its tributaries, carving the estuary deeper. Secondly, post-glacial rebound after the removal of the weight of ice over Scotland caused the island of Great Britain to tilt about an east–west axis, because isostatic rebound in Scotland and Scandinavia is pulling mantle rock out from under the Netherlands and south England: this is forebulge sinking.