article_snippet.sent: this stunning show shows 'ribbons' of sand and patterned stripes known as linear dunes in the Erg Chech, a desolate sand sea in southwestern Algeria - but the exact cause of these longitudinal structures is not known.
article_snippet.sent: This image shows 'ribbons' of sand and patterned stripes in an area known as the Erg Chech, a desolate sand sea in southwestern Algeria - but the exact cause of these longitudinal structures is not known .
article_snippet.sent: Erg' comes from the Arabic word for 'field of sand dunes'
highlights_snippet.sent: The image of the patterned stripes in the Saharan desert are examples of linear, or longitudinal, dunes in Erg Chech - a desolate sand sea in southwestern Algeria .
  
highlights_snippet.sent: 'Erg' comes from the Arabic word for 'field of sand dunes' and the cause of such shapes is not known .
  