Continued local floods, earth movements, and volcanic activity, leaving extensive recent fossil sites, lava beds, river gravels, etc. Again, immense destruction is implied here. What is problematic for the ICR is the ample evidence of numerous other older glaciations. In the Grand Canyon, Permian and Pennsylvanian strata are considered by the ICR to have been deposited during the Flood. The above paragraph elicited the only creationist response and some additional discussion.
Ice cores provide valuable evidence concerning the duration of ice ages.
At depth, the layers thin and disappear. Dating efforts rely on concentrations of 18 O, volcanic gases and particulates, flow modeling, et cetera. But if Noah's Flood is true history, more snowfall and volcanism would follow the Flood, and unusual variations in 18 O, volcanic gases, and particulates would be expected. The deep layers may thus reflect intense, individual post-Flood episodes and eruptions, not annual cycles. Now we see the method involved in ICR science.