Andreas Bauerochse and Hanns Hubert Leuschner
49
years BC
4700 4650 4600 4550
construction /
LSBPC
4750 4700 4650 4600 4550 4500 4450
years BC
Fig. 4 Life spans and annual growth curves of Pr 31 timbers plotted against the mean curve of all Pr 31 timbers and the Lower Saxony
bog pine chronology (LSBPC). Each curve displays the life span of a tree and its annual growth rate. The horizontal lines within the growth
curves mark the average growth rates. If the curve runs above this line, the annual growth rate is above average, black curve sections in-
dicate growth depressions with growth rates below average. The trackway was built in the middle of the 47th century BC and, as reflected
by the dying-off/cutting data of the timbers, used over a period of about 100 years. A, B, C, and D mark phases of construction work (tree
cuttings). According to the data, last maintenance works were done in 4538 BC. Clear periods of growth depressions indicate a continuing
water level increase, which finally can have led to the trackway being abandoned (graphics: H. H. Leuschner).
49
years BC
4700 4650 4600 4550
construction /
LSBPC
4750 4700 4650 4600 4550 4500 4450
years BC
Fig. 4 Life spans and annual growth curves of Pr 31 timbers plotted against the mean curve of all Pr 31 timbers and the Lower Saxony
bog pine chronology (LSBPC). Each curve displays the life span of a tree and its annual growth rate. The horizontal lines within the growth
curves mark the average growth rates. If the curve runs above this line, the annual growth rate is above average, black curve sections in-
dicate growth depressions with growth rates below average. The trackway was built in the middle of the 47th century BC and, as reflected
by the dying-off/cutting data of the timbers, used over a period of about 100 years. A, B, C, and D mark phases of construction work (tree
cuttings). According to the data, last maintenance works were done in 4538 BC. Clear periods of growth depressions indicate a continuing
water level increase, which finally can have led to the trackway being abandoned (graphics: H. H. Leuschner).