there is a total absence of stratification.

James Geikie says:

"In describing the till, I remarked that the irregular manner in
which the stones were scattered through that deposit imparted to it a
confused and tumultuous appearance. The clay does not arrange itself
in layers or beds, but is distinctly unstratified."[1]

"The material consisted of earth, gravel, and stones, and also in
some places broken trunks or branches of trees. Part of it was
deposited in a pell-mell or unstratified condition during the
progress of the period, and part either stratified or unstratified in
the opening part of the next period when the ice melted."[2]

"The unstratified drift may be described as a heterogeneous mass of
clay, with sand and gravel in varying proportions, inclosing the
transported fragments of rock, of all dimensions, partially rounded
or worn into wedge-shaped forms, and generally with surfaces furrowed
or scratched, the whole material looking as if it had been scraped
together."[3]

The "till" of Scotland is "spread in broad but somewhat ragged
sheets" through the Lowlands, "continuous across wide tracts," while
in the Highland and upland districts it is confined principally to
the valleys.[4]

[1. "The Great Ice Age," p. 21.

2. Dana's "Text-Book," p. 220.