Ice core dating
The method of counting annual layers only works with the high accumulation Greenland ice sheet.
However, the deep Antarctic ice sheet cores have been dated to over 300,000 years showing multiple ice age cycles.
For the visible strata (and, we believe, for any other annual indicator at accumulation rates representative of central Greenland), it is almost certain that variability exists at the subseasonal or storm level, at the annual level, and for various longer periodicities (2-year, sunspot, etc.).
We certainly must entertain the possibility of misidentifying the deposit of a large storm or a snow dune as an entire year or missing a weak indication of a summer and thus picking a 2-year interval as 1 year.
For instance, in the oxygen isotope method, uniformitarian scientists normally need eight measurements per annual cycle to pick up the “annual” signature.
As an example, halfway down the GRIP Greenland ice core at about one mile (1,600 m) deep, uniformitarian scientists believe the annual layer thickness is 4 inches (10 cm).3 The measurements for oxygen isotopes would then be spaced every 1/2 inch (1 cm) apart.
These storm oscillations may be on the order of several days.
It is observed today that these ice sheets incorporate dust, acids, pollution, etc. Near the top of the ice sheets, annual layers can be distinguished by measuring the many variables related to the seasons.
It still needed to cool another 11°F (6°C) to reach the current average of 39°F (4°C).
The relatively warm water adjacent to Greenland and Antarctica during deglaciation would have continued to cause significantly greater ocean evaporation resulting in relatively high precipitation to fall on the Greenland and Antarctic ice sheets.
These dates are not objective; they simply are based on the assumption of the astronomical theory and old age, which was discussed in chapter 6.
It is easy to reinterpret the data from the ice sheet within the creationist’s framework, as we will see in the next section.
Search for ice core dating:
At the peak of the Ice Age, the average thickness of the ice sheets in the Northern Hemisphere was estimated to be 2,300 feet (700 m), while on Antarctica it was 3,900 feet (1,200 m).