What are fluvio-glacial deposits like?
In theory, fluvio-glacial sediments should be intermediate in form between glacial sediments (unsorted and not rounded) and fluvial sediments (well sorted and rounded). In practice, this is not always the case. Glacial and fluvio-glacial sediments is derived from a similar origin, especially frost shattering. Ice-contact features (such as the deposits of englacial streams) will be less easy to distinguish from glacial deposits than pro-glacial features (deposits beyond the limit of the ice) because sediments in ice-contact features will have undergone less fluvial sorting and erosion.
