Dear authors,

Many thanks for submitting a revised version of your interesting study based on the re-processing of airborne electromagnetic data following the three reviewer’s suggestions and comments. I went through your comments and changes of the manuscript and agree with your revisions. The manuscript has improved and your comprehensive discussion of the raised issues is plausible.
I have some rather technical comments that need to be addressed before final publication, please find them below.
Thanks for your contribution,
Ulrike Werban

L 164-166 „It is probably worth reminding, one more time, “ While I completely agree with the statement on the ill-posed problem, I would like to note that the beginning is a little loosely formulated. I suggest to rephrase this sentence.

L 179-180 “unfortunately, stochastic inversion schemes are still not available (or, at least, not practically feasible) for problems at this scale” I suggest to avoid valuation of the recent situation of applicable inversion schemes or at least to give reference.

Figure 9 – the resolution is rather poor, especially of section c) – could you please increase resolution of section c)
L 64 Jørgensen, Møller, et al. 2013 – please check
L 427 and l 612 MacGabhann or Macgabhann 2005 – please check
Please check if the following references – they don’t show up in the manuscript itself:
Asch, T., Abraham, J., & Irons, T.: A Discussion on Depth of Investigation in Geophysics and AEM Inversion Results, SEG Technical Program Expanded Abstracts 2015, 2072-2076, https://doi.org/10.1190/segam2015-5915199.1, 2015.
Bernard, J.: Short note on the depth of investigation of electrical methods. Orléans, Fracia: IRIS Instruments, 8, 2003.
Gaisie, J. S., & Winter, J.: Tillite in the Togo formation in Ghana. Accra, Ghana, 1973.
Gulbrandsen, M. L., Jørgensen, F., Dahlqvist, P., & Persson, L.: A 3D geological soil-modelling workflow using AEM data - A case study from Gotland, Sweden. 7th International Workshop on Airborne Electromagnetics, Kolding - Denmark, June 17 - 20, p. 4.,2018.
Jessell, M., Boamah, K., Duodu, J. A., & Ley-Cooper, Y.: Geophysical evidence for a major palaeochannel within the Obosum Group of the Volta Basin, Northern Region, Ghana, Journal of African Earth Sciences, 112, 586-596, doi:10.1016/j.jafrearsci.2015.04.007, 2015.
Jørgensen, F., Menghini, A., Vignoli, G., Viezzoli, A., Salas, C., Best, M. E., & Pedersen, S. A.: Structural Geology Interpreted from AEM Data-Folded Terrain at the Foothills of Rocky Mountains, British Columbia, 2nd European Airborne Electromagnetics Conference. Malmö, Sweden, September 3 - 7, 2017.
Loke, M. H., & Barker, R. D.: Rapid least‐squares inversion of apparent resistivity pseudosections by a quasi‐Newton method 1, Geophysical prospecting, 44(1), 131-152, doi: 10.1111/j.1365-2478.1996.tb00142.x, 1996.
Loke, M. H.: Rapid 2D resistivity and Iinversion using the least-squares method RES2DINV. Program Manual, 1997.
Meier, P., Kalscheuer, T., Podgorskii, J. E., Kgotlhang, L., Green, A. G., Greenhalgh, S., Rabenstein, L., Doetsch, J., Kinzelbach, W., Auken, E., Mikkelsen, P., Foged, N., Jaba, B.G., Tshoso, G., &Ntibinyane, O.: Hydrogeophysical investigations in the western and north-central Okavango Delta (Botswana) based on helicopter and ground-based transient electromagnetic data and electrical resistance tomography, Geophysics, 79(5), B201-B211, doi: 10.1190/geo2014-0001.1, 540 2014.

Dear authors,
please include the technical corrections given by the Editor Ulrike Werban, and then we are looking forward seeing your manuscript published.
With best regards, Lotte Krawczyk.