Assertion: agate | /r/HasProperty | tumbled by pumice abrasive
Facets:
Source sentences:
text: 1315 High Desert Beach Agates, Oregon, a term used by Gail (1972, p. 538-539) to describe agates that were tumbled by wave action and pumice abrasive in sediments of an ancient lake that would have been situated some 30 miles south of Burns, Oregon, in the Harney Valley.