Evidence for a Permafrost Layer of Ice Just a Few

Multiple Choice

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.