Microscope image of oak tree ring (IMAGE) Swansea University Caption A close-up of some oak tree rings. The porous earlywood is formed during the spring and the darker latewood is formed in the summer time. Researchers will soon be able to reconstruct the climate of north-west Europe including the UK over the last 4500 years, and to date wooden buildings and objects more accurately, by analysing the chemistry of ancient oak trees, through a new Swansea-led project just selected for €3 million in European funding. Credit UK Oak Project; Swansea University/Oxford University Usage Restrictions Only use with credit as below License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.