[Rockhounds] Did subglacial meltwater create Martian channels and valleys?

[Paul]

Early Mars was covered in ice sheets, not
flowing rivers, researchers say
University of British Columbia, August 3, 2020
https://www.sciencedaily.com/releases/2020/08/200803120154.htm

Summary:

"A large number of the valley networks scarring
Mars's surface were carved by water melting
beneath glacial ice, not by free-flowing rivers
as previously thought, according to new research.'

Grau Galofre, A., Jellinek, A.M. & Osinski, G.R,.
2020, Valley formation on early Mars by
subglacial and fluvial erosion. Nature Geoscience, 2020
https://www.nature.com/articles/s41561-020-0618-x

Other recent papers:

Shaw, J., Gilbert, R.G., Sharpe, D.R., Lesemann,
J.E. and Young, R.R., 2020. The origins of s-forms:
Form similarity, process analogy, and links to
high-energy, subglacial meltwater flows.
Earth-Science Reviews, 200, p.102994.
https://www.sciencedirect.com/science/article/pii/S0012825219301710

Rodriguez, J.A.P., Dobrea, E.N., Kargel, J.S., Baker,
V.R., Crown, D.A., Webster, K.D., Berman, D.C.,
Wilhelm, M.B. and Buckner, D., 2020. The Oldest
Highlands of Mars May Be Massive Dust Fallout
Deposits. Scientific reports, 10(1), pp.1-15. Open Access
https://www.nature.com/articles/s41598-020-64676-z

Yours,

Paul H.