Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Ruins of León Viejo' has mentioned 'Soil' in the following places:
Occurrence Sentence Text Source
Morphologically the soil is a mixture of volcanic sand, clay and degraded of bedrock dirt geologically known as pumice, by which dirt takes a white color - yellowish and very soft texture.
Due to the soil characteristics, it proved impossible to define the morphology of the burial, no special arrangements were observed, only that the head rested on small volcanic stones "Tufa".
Furthermore, 4 unearthed specimens are below the soil of the Spanish occupation, that according to the stratigraphic geomorphology are registered at a depth ranging from .60 to 1.80 m. and one of burials was found in a funeral urn with animal remains inside.