Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Acropolis, Athens' has mentioned 'Erosion' in the following places:
Occurrence Sentence Text Source
Erosion of the limestone nappe led to the eventual detachment of the Acropolis, forming the present day feature.
Many of the hills in the Athens region were formed by the erosion of the same nappe as the Acropolis.
The limestone that the Acropolis is built upon is unstable because of the erosion and tectonic shifts that the region is prone to.