Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Wadi Al-Hitan (Whale Valley)' has mentioned 'Erosion' in the following places:
Occurrence Sentence Text Source
A few of these skeletal remains are exposed but most are shallowly buried in sediments, slowly uncovered by erosion.
The geology of the valley gives rise to the scenery, with wind and water erosion producing spectacular cliffs and buttes.