How did sand and gravel deposits form on the North European Plain?

The sand and gravel deposits on the North European Plain are primarily the result of Pleistocene Epoch glaciation. As the massive ice sheets advanced and subsequently melted, they fundamentally reshaped the landscape through both erosion and deposition.12

The formation of these specific deposits occurred through two primary mechanisms:

• Glacial Outwash: As the ice sheets decayed, large volumes of meltwater flowed away from the ice front. These rushing glacial streams carried sediment and laid down extensive sheets of sand and gravel in areas known as glacial outwash plains.13
• Spillways: In regions such as northern Germany and Poland, long, parallel spillways were created where meltwaters flowed toward the sea, following the margin of the ice. These channels were heavily covered with sand and gravel deposited by the high-energy glacial streams.1

While these areas are often characterized by these sandy, gravelly soils, other parts of the plain are blanketed by moraine—a mixture of clay, boulders, and other debris left directly by the retreating ice—or by windblown loess deposits.213