Quaternary sediments

HI, I'm doing an essay which is assessing the controls on a depositional model I have created for an area of Essex and in Scotland using lithofacies.
The environments are glacial and fluvial. I'm finding it really difficult to correlate controls on the environments with sedimentary structure. does anyone know of the controls on glacial and fluvial environments and what may be evidence for them in terms of lithofacies?
Thanks!