Assertion: desert's sand | /r/Synonym | erg
Facets:
Source sentences:
text: These dunes are found in huge areas of shifting sand called ergs.
text: Stretches of shifting sands known as ergs—the extensive Algodones Dunes of the Colorado-Yuma desert are a notable example—are found at lower elevations, with the shallow troughs of arroyos carrying intermittent streams from surrounding uplands to be lost in the sands.