Issaouane Erg confined to basins. Sand in the Issaouane Erg, below the level of the sand dunes, has accumulated to a depth of 20 to 30 meters. It has barchan dunes as well as star dunes of 300 to 430 meters high. The presence of both barchan dunes (which form due to unidirectional winds) and star dunes (which form when winds from various directions deposit sand) "suggests that wind regimes have changed over time". NASA's "Earth Observatory" notes all three types of erg dunes are present in the photos of the Issaouane Erg taken from the International Space Station: stationary mega dunes,
That's What Love Is Made Of several famous nursery rhymes in this song; in fact, the song's title itself is a variation of the rhyme "What Are Little Girls/Little Boys Made Of?" and parts of this famous rhyme were incorporated into the lyrics of this song, which, like many Miracles songs, starts with the guitar licks of Miracles member Marv Tarplin. Robinson, as the lead singer, serves as the song's narrator: ""You take Sugar and Spice...Everything Nice... and you've got a little girl, yeah, yeah...You take Snakes and Snails...Puppy Dog's tails...and you've got a little boy, yeah, yeah...That's what Love Is Made Of..." " The song