When you say:
It is also invalidated due to insects in the core sample being 450,000 years old. If Greenland were scooping ice, the insects would be around 12,000 years old.
I do not know why you got that idea, but IMO since throughout the Last Glacial Maximum (during the Quaternary glaciation) the existing ice reached thicknesses of 4 km, thus, it would seem rather credible for Greenland to have «scooped up»:a large portion of that ancient ice.
The creation of 3 to 4 km (1.9 to 2.5 mi) thick ice sheets caused a global sea level drop of about 120 m (390 ft).
Regarding the bugs trapped within the ice, i disagree that they would be only as old as 12.000 years. Whatever got trapped would become and actually is an unsuspitioned part of the old whole Pleistocenic ice that existed, and consequently, all the dating could have been done on samples that were ripped off from the larger body of ice, as i had stated in the analogy.
Edited by Mario Dantas, 22 February 2013 - 02:11 AM.