Assertion: gypsum | /r/MadeOf | original deposition
Facets:
value: in the wellington formation
type: TEMPORAL
Source sentences:
text: If gypsum were formed by original deposition in the Wellington formation, however, the possibility still remains that some gypsum was formed by the alteration of anhydrite.
text: There is no conclusive evidence that gypsum was formed by original deposition; furthermore, this mode of origin requires a much more complicated explanation.