Tree rings at Campfield Marsh

 This bog oak is at Campfield Marsh RSPB.

The tree rings are much closer together than yesterday's post. It has occurred to me since that if the stump on the beach had been in the sea, it might have expanded and that could have made the tree rings wider. It might be true that being in a bog for thousands of years could have shrunk the rings. Anyway, I was able to count up to about 100 rings again. 7000 years ago was during the Atlantic Period which was a warm and wet period. You'd expect that to encourage growth so perhaps wider rings. That needs checking.