the.com/sand sea
A desert's version of an ocean — dunes instead of waves, silence instead of tides.
means A vast expanse of desert dominated by extensive dune fields rather than rock or gravel — what geographers call an erg.
from The term is a straightforward descriptive compound — 'sand' plus 'sea' — coined by travelers and geographers who looked out at endless dune fields rippling to the horizon and reached for the only comparison big enough: the ocean. 'Erg,' the technical term geologists also use, comes from Arabic 'arq' via French, but 'sand sea' itself is just plain English doing what it does best, naming a thing by what it resembles.
- official threshold
- needs over 125 square kilometers of dunes to qualify
- biggest example
- Rub al Khali covers an area larger than France
- dune motion
- whole dunes migrate downwind, sometimes meters per year
- other worlds
- Mars and Titan both have their own sand seas