It’s drumsand, a geological feature unique to Arrakis invented for the book. I appreciate that this isn’t spelt out in the film but surely an intelligent audience member should be able to deduce that this is a sci-fi concept and not real life?
Fun fact, it actually does come up in the dialogue of part 1 when Paul and Jessica are running for the rocks from the sand worm, just before they meet the Fremen. It’s under some of the music/ambience but Paul steps onto some and there is an audible thump before he notes that it’s drum sand, so it is very briefly brought up.
It’s drumsand, a geological feature unique to Arrakis invented for the book. I appreciate that this isn’t spelt out in the film but surely an intelligent audience member should be able to deduce that this is a sci-fi concept and not real life?
Fun fact, it actually does come up in the dialogue of part 1 when Paul and Jessica are running for the rocks from the sand worm, just before they meet the Fremen. It’s under some of the music/ambience but Paul steps onto some and there is an audible thump before he notes that it’s drum sand, so it is very briefly brought up.
You can see the scene here:
https://youtu.be/6hU78elkK6Q?t=84