An unsorted and unstratified accumulation of glacial sediment, deposited directly by glacier ice.
with the comment:
Till is a heterogeneous mixture of different sized material deposited by moving ice (lodgement till) or by the melting in-place of stagnant ice (ablation till). After deposition, some tills are reworked by water.
this GCW term is also in SWEET http://sweetontology.net/realmLandGlacial/Till. It should have the definition:
An unsorted and unstratified accumulation of glacial sediment, deposited directly by glacier ice.
with the comment:
Till is a heterogeneous mixture of different sized material deposited by moving ice (lodgement till) or by the melting in-place of stagnant ice (ablation till). After deposition, some tills are reworked by water.