[Shop-talk] Fabric for gravel driveway

[cornerexit]

I need to put in a couple of gravel driveways on a couple of pieces of
property this summer and was wondering what the fabric is that's used as an
underlayment is called?  Geo something?  Somebody told me they use "dryer
felt"? What the heck is dryer felt?

 

Is this Geo fabric the same stuff that I see silt fences made out of?

 

What type of store should I go to for this fabric?