>>1662285Some of the glaciers are receding and underneath them is 7000 - 3000 year old spruce tree remnants. A long time ago a forest grew, the glacier advanced and mowed the forest over 7000 years ago, then it receded and did it again 3000 years ago. I took this pic and you can see the stumps. It used to be a cool science story until the global warming fanatics tried and buried it.
tl;dr glaciers have been advancing and receding for thousands of years