Imperfectly draining, fine-textured alluvial soil with weak horizon differentiation.
Links:
[1] https://www.hutton.ac.uk/staff/allan-lilly
[2] https://www.hutton.ac.uk/learning/exploringscotland/introduction
[3] https://www.hutton.ac.uk/learning/exploringscotland/soils
[4] https://www.hutton.ac.uk/learning/exploringscotland/soils/immaturesoils