Parent materials mode of meposition in the Prairie Provinces

Alluvial

Alluvial material deposited by modern stream water: variable deposit of sand, silt and clay.

Eolian

Eolian material deposited by wind. Uniform deposit of very fine sand and silt.

Fluvioglacial

Fluvioglacial material deposited by flowing glacial meltwater. Mostly sand and/or gravel.

Lacustrine

Lacustrine material deposited by glacial lake water. Mostly silt and clay.

Morainal

Morainal marterial deposited by ice. A mixture of boulders, stones, sand, silt and clay.

Organic

Organic material deposited when accumulation exceeds decomposition. Stratified deposit of peat.