In 1950, R. E. Beschel proposed the lichenometric dating technique. For age determination, the diameter growth rate of lichens is usually taken as a constant. Alternatively, the growth curve of lichens is derived by d...In 1950, R. E. Beschel proposed the lichenometric dating technique. For age determination, the diameter growth rate of lichens is usually taken as a constant. Alternatively, the growth curve of lichens is derived by dating objects of known age in some area, and it can then be used for age determination in the same area or areas of similar environment. Unfortunately it is very difficult to obtain such growth curves in many places. The growth curves differ in different environments. In order to use this technique under all conditions, the relationship between the lichen growth and the environment has to be investigated.展开更多
文摘In 1950, R. E. Beschel proposed the lichenometric dating technique. For age determination, the diameter growth rate of lichens is usually taken as a constant. Alternatively, the growth curve of lichens is derived by dating objects of known age in some area, and it can then be used for age determination in the same area or areas of similar environment. Unfortunately it is very difficult to obtain such growth curves in many places. The growth curves differ in different environments. In order to use this technique under all conditions, the relationship between the lichen growth and the environment has to be investigated.
