Tools of the Ancients

Two lives lost because of the detritus of a pointless war long ago.  

But the weapons deployed by humans pale beside the cunning devices wielded by the Ancients in the war that ultimately led to the end of the First Age of Earth civilizations. Our "Great War" was a pillow fight in comparison, if translations of the few Progenitor tablets thus far found can be trusted.  What strange things were left hidden in the Precambrian muck, buried under kilometers of sediment, and only now working their way back to the surface as we delve ever more deeply?

Would we understand how such things work?
Would we be able to defuse them, or even contain the forces unleashed?

Would we even recognise them as weapons?

And what happens when someone inadvertently triggers one?

Or wakes it...

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Sources: 
http://io9.com/the-first-world-war-claims-two-more-victims-1548135450
http://aphilosopher.wordpress.com/2008/02/25/pre-human-civilizations/
http://www.amazon.com/Before-Atlantis-Million-Pre-Human-Cultures/dp/1591431573
http://www.kuro5hin.org/story/2002/6/5/7320/94554