Evidence for a permafrost layer of ice just a few meters below the surface of Mars include:
A)outflow channels and ancient river deltas.
B)"hydrated" chemical compounds found on surface rocks.
C)carbonate rock layers that are in low abundance.
D)"fluidized ejecta" craters.
E)river channels and flood plains that look identical to such features on Earth.

Question

Quizplus · Accepted Answer

"Fluidized ejecta" craters are a type of impact crater that are associated with impacts into subsurface ice or frozen ground. The impact shock creates a melt layer that mixes with the underlying ground, causing a fluid-like movement of the material. This is a strong indication of subsurface ice on Mars, just a few meters below the surface. Outflow channels, ancient river deltas, river channels, and flood plains are all indicative of past water activity on Mars, but do not necessarily provide evidence for a permafrost layer of ice just a few meters below the surface. "Hydrated" chemical compounds found on surface rocks and low-abundance carbonate rock layers can indicate past or current water activity, but do not necessarily provide direct evidence for a permafrost layer of ice at shallow depths.

Evidence for a Permafrost Layer of Ice Just a Few