I mean, a desert is basically just a huge amount of sand but where does it stop, what is beneath? I googled it and it says there’s groundwater but what does that mean, and (how) is that even possible?
Edit: So, actually the main question I wanted to know is if there’s a exact border between sand and rock, or if the sand just gets denser and denser until it’s rock (but I believe the weight must not be that big), like Saturn or something.
(Yes, I know what a desert is but I specifically need to know about this certain type of desert)
In: 1165
It depends where you are. The present desert you see is all “modern” sediments that are blown around. It depends where you are in the world. In the Sahara sometimes between the dunes you can find lake sediments (and ancient human artifacts who lived around the lake) from when the Sahara had lakes. Below those sediments the Sahara has a lot of different bedrock, some is lithified Cambrian aged hard rocks.
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