Ancient Tools Revealed by Melting Arctic Ice

Live Science:

Ancient Tools Revealed by Melting Arctic Ice

Warming temperatures are melting patches of ice that have been in place for thousands of years in the mountains of the Canadian High Arctic and in turn revealing a treasure trove of ancient hunting tools.

Ice patches result from layers of annual snow that, until recently, remained frozen all year. As Earth's temperature has warmed in recent decades due to the accumulation of heat-trapping greenhouse gases in the atmosphere, some of the ice patches have begun to melt away, sometimes revealing ancient artifacts to the surprise of archaeologists.

That discovery allowed Andrews and his team to get more funds that the team then used to explore eight ice patches in four years. The results have been extraordinary: Andrews and his team (including members of the indigenous Shutaot'ine or Mountain Dene) have found 2,400-year-old spear throwing tools, a 1000-year-old ground squirrel snare, and bows and arrows dating back 850 years.

If "Warming temperatures are melting patches of ice that have been in place for thousands of years" then how did 2,400, 1,000 and 850 yr-old artifacts sneak underneath it?
And what were primit -- uh, less technologically advanced humans doing that caused the ice to melt back then?

The article mentioned that previous finds were found between layers of ice. Perhaps it isn't that all the ice is melting away but just enough of it is melting exposing layers of ice that hadn't been seen for centuries.

ChadS

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