If confirmed, the discovery could have important implications for the history of water and climate on Mars, because it suggests there were large reservoirs of subsurface ice when the lobate debris aprons formed. Scientists think these features formed in mid- to late Amazonian times – the Amazonian being the cold, dry period of Martian history which began around 1.8 billion years ago and lasts to the present day.
Just like the cold, dry Amazon! What an apt moniker. Probably there is some real explanation for this that will make me seem totally uneducated. But until then, ?!?!