The archaeological samples in question are Bog Oak that are over 3000 years old and have been excavated fro Garry Bog, Co. Antrim. These trees along with others have been used to build a tree ring chronology that can aid archaeological dating and also track climate changes. Climate changes can be tracked because the width of a tree ring depends on the growing conditions prevalent that year. It was noted in the chronology that in some years of the 11th century B.C. the growth rings were extremely small, denoting very bad growing conditions. This is attributed to the massive eruption of Mt. Hekla in Iceland. The aim of the project was to determine whether chemical data that track the change in growth rings could be gathered from these samples. The samples were divided up into different sections corresponding to separate time periods. Samples were then processed into liquid form and analysed using ICP-MS. The concentrations of several elements were determined. Initial results indicated that the concentrations of a range of elements were elevated in the years following the eruption. However further work only shows this pattern for copper. The data can be said to be inconclusive but can also be seen as a basis for further work.