Assertion: lichen | /r/HasProperty | preserved on old rock faces
Facets:
Source sentences:
text: Lichen can be preserved on old rock faces for up to[citation needed] 10,000 years, providing the maximum age limit of the technique, though it is most accurate (within 10% error) when applied to surfaces that have been exposed for less than 1,000 years.
text: Lichen can be preserved on old rock faces for up to[citation needed] 10,000 years, providing the maximum age limit of the technique, though it is most accurate (within 10% error) when applied to surfaces that have been exposed for less than 1,000 years.