==Can you provide a source for that showing some analysis of those cores that supports a YEC theory?
Here’s a great article, written for the layman, summarizing the evidence in favor of YEC right here:
http://www.detectingdesign.com/ancientice.html#Summary
I don't see any positive evidence is support of YEC theory or any kind of analysis of those ice cores that verifies or supports the 6-10k year hypothesis.