[meteorite-list] Did subglacial meltwater create Martian channels and valleys?

From: Paul <etchplain_at_meteoritecentral.com>
Date: Thu, 6 Aug 2020 20:04:51 -0500
Message-ID: <8a1d2a86-6129-ec6e-fe7b-53eaffbdf3de_at_att.net>

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.

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