s a hint, th first one is a LIDAR map and its program was probably SLOPESHADE. Its not really topo , its a reconstruction of slopes (darker the shading, steeper the slope)
As far as its nomenclature, not sure its a tuneldahl. I do think youre right because theres a tunellach and the S side of the LIDR map shows a really sharp cut bank as if it were eroded rapidly.
and its floor is sharply cut, (not glacially cut). There are some features on the LIDAR that show glacial features.
I think youre on th right track but Id look at the history pf the section as you can see from the LIDAR and the cuts.