Assertion: ultramafic magma | /r/HasProperty | low
Facets:
value: based on the evidence
type: OTHER
value: very
type: DEGREE
value: in silica content
type: LOCATION
Source sentences:
text: Based on the evidence found in ultramafic rock samples, Ultramafic magmas were very low in silica content (probably around 40 percent or lower) and very high in iron, magnesium, and calcium (perhaps running as high as 32 percent).