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Yes. Lichens can contribute to the weathering of rock and the formation of soils.

Though previously suspected but now widely accepted that lichens can contribute to the weathering of rock and the formation of soils.There major long-term role has been as biological weathering agents, with a pedogenic action which is both physical and chemical in nature. The physical action of weathering is through penetration by rhizenae and expantion and contraction of thalli, and / or chemical, due to caron dioxide, oxalic acid, and the complex action of lichen substances.

References:

Syers,J.K. and Iskander, I.K. (1973). Pedogenic significance of Lichens. In The Lichens, ed. V. Ahmadjian and M.E. Hale, pp. 225-248. New York: Academic Press

Jones, D.(1988). Lichens and Pedogenesis. In CRC Handbook of Lichenology, Vol. 3ed. M. Galun, pp.109-124. Boca Raton: CRC Press.

Seaward, M.R.D. Environmental role of lichens.In Lichen Biology, 2ed. T.H. Nash III, pp. 274-298.Cambridge University Press, UK

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How do lichen and moss help to create soil?

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