Assertion: soil's rock | /r/HasProperty | the parent material
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Soils may be characterised in terms of the properties they inherit from the underlying rock (the parent material) and the properties resulting from alteration of the original parent material by soil forming processes (also called ‘pedogenic’ processes).
text: The broken and eroded rocks and minerals in a particular area's soil are sometimes called the soil's "parent material.