Fig. 8

Fire history record for studied landscape in north-central Pennsylvania, USA, grouped by locations of trees recording prior to 1609, relative to three adjacent landforms, Park, Big, and Bald Hills. Horizontal lines represent the tree-ring record for individual trees; bold vertical ticks on horizontal lines indicate fire scar years. On the left ends of lines, vertical ends indicate pith years, and diagonal ends indicate inner-most ring year (unknown number of rings missing to pith). On the right ends of lines, diagonal ends indicate outer-most ring years (unknown number of rings missing to bark). At the bottom of each graph, a composite record of all fire event years recorded by these trees is shown. The vertical red dashed line indicates the end of the Pre-1609 sub-period