@Ljubo: Thanks! 1000 years ago, much of southern Jordan was covered by a shallow sea. Now, the are hundreds of these 'lakebed' imprint flats between and underneath the dunes and rocky outcrops.
@Calusarus: Thanks Frederic -- yes, i love this shot... when i was standing there, i must have looked at this dry lakebed for at least 10 minutes... just tracing all the natural lines and cracks... it was captivating!