Lichen dating method

Determine whether there are local lichen species with suitable growth patterns for dating.

If you know the history of at least some of the additional sites, you will be able to test, and possibly refine, your calibration data. Try them out and see if your calibration is improved. Lichenometry: An Accessible Method for Dating Recent History (Geological and Manmade).

Do your additional results give you more confidence in the method? Are you planning to do a project from Science Buddies? Retrieved from https:// Note: A computerized matching algorithm suggests the above articles.

The method was first developed by Roland Beschel in the 1950s, by measuring lichen diameters on gravestones of different ages.

The burial dates from the gravestones were taken as the starting point for lichen growth, and used to create a graph of lichen diameter vs. The graph could then be used to date local gravestones or rocks with unknown dates, by measuring the diameter of lichen colonies.

You will want to start this science project by doing background research to develop your expertise on the biology of lichens and on the methods of lichenometry.

When doing your research on lichen biology, be sure to figure out the following terms: symbiosis, symbiont, mycobiont, photobiont, and thallus.In this geology science project, you will use lichenometry as a method for dating relatively recent events in your area, such as the formation of a manmade or geological feature or a disturbance in your area (for example, the building of a stone wall, the occurrence of a rock slide, or when a road was cut).A trained geologist can "read" ancient history in layers of rocks.Think for a moment about the assumptions being made. Do you have to make measurements using only one type of rock?How close must the known and unknown rocks be in order for the growth rates to be comparable?All else being equal, those surfaces that have been undisturbed for longer times will have colonies with larger diameters.

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