moreenikerrokset

Moreenikerrokset, often referred to as till in English, are a type of glacial deposit formed directly by ice. They are characterized by their unsorted and unstratified nature, meaning they contain a mixture of sediment sizes ranging from fine clay and silt to pebbles, cobbles, and even boulders. This heterogeneous composition is a result of the ice's ability to pick up and transport debris of all sizes as it moves across the landscape.

When glaciers melt or retreat, the debris embedded within the ice is deposited. The melting process does not sort the material by size or density, leading to the formation of moreen. The texture of moreen can vary significantly depending on the source material the glacier flowed over and the conditions under which it was deposited. Some moreen can be hard and compact, while other deposits may be looser and more granular.

Moreen is a widespread glacial landform and a significant component of many landscapes sculpted by past glaciations. It forms the parent material for soils in many regions and can influence hydrological properties. Features such as moraines, which are ridges or mounds of moreen, are direct evidence of past glacial activity. The study of moreen provides valuable insights into glacial dynamics, paleoclimates, and the geological history of glaciated areas.