Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Škocjan Caves' has mentioned 'Cretaceous' in the following places:
Occurrence Sentence Text Source
Explored length of caves is 6,200xc2xa0m (20,300xc2xa0ft), caves have formed in 300-metre-thick (980xc2xa0ft) layer of Cretaceous and Paleocene limestone.
The heart of the site, the main cave system with the underground stretches of the Reka River, has been formed in a thick layer of cretaceous limestone.