Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Serengeti National Park' has mentioned 'Lava' in the following places:
Occurrence Sentence Text Source
The grasslands grow on deposits of volcanic ash from the Kerimasi Volcano, which erupted 150,000 years ago and also from the Ol Doinyo Lengai volcanic eruptions, which created layers of calcareous tuff and calcitic hard-pan soil from rapid weathering of the Natrocarbonatite lava produced by the volcanoes.