Lichenometry is a technique used to determine the 1 Rate of decay of an ecosystem 2 Age of expo...........

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Lichenometry is a technique used to determine the

1.Rate of decay of an ecosystem

2.Age of exposed rock surfaces

3.Acidic content of water bodies

Select the correct answer using the codes below.

1 and 2 only

3 only

2 only

1 and 3 only

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Explanation:

Lichen is a symbiotic relationship between Fungi and algae.
The technique of Lichenometry is used in archaeology, palaeontology, and geomorphology. It uses the presumed regular but slow rate of lichen growth to determine the age of exposed rock.
Measuring the diameter (or other size measurement) of the largest lichen of a species on a rock surface indicates the length of time since the rock surface was first exposed.
Lichens occur from sea level to high alpine elevations, in a very wide range of environmental conditions, and can grow on almost any surface.