Assertion: borax's boron | /r/HasProperty | supplied by solfataras of volcanic origin
Facets:
value: very
type: DEGREE
value: probably
type: DEGREE
Source sentences:
text: The boron contained in solution in the salt lakes has very probably been supplied by hot springs and solfataras of volcanic origin, such as those which at the present day charge the waters of the lagoons in Tuscany with boric acid.