Not really an earthen floor...

I'm building a carport with/for my church nephew.
We are leveling the ground and plan on installing some very stout plastic pallets as a floor.
Once we get the grade close to level, we were planning to tamp the soil and level the  foundation using sand.

I'm not sure if this is the best way to do this , and I was hoping for some feedback.

I just saw this video. If I was doing a floor I would try this!


https://www.youtube.com/watch?v=35RSTsHkgkQ



I have never done that though.  It just looks really cool!

What I have done is a cob floor.  It is not water proof though.  I have to take care of it and not let it get too wet or it will get soft.  


My favorite floor ever is in the wofati house at Wheaton Labs!   It is a very nicely done fine cob finished with linseed oil.   It looks so professional and is a joy to walk on barefoot.

We have moved a lot of soil, and I've learned some about laying pavers, which is the closest thing to the floor we are trying.
Rather than sand, we will be using gravel.
We will use surplus weed cloth as a barrier between the soil and the gravel.

Pavers are usually edged with either a plastic boarder or a concrete one.
I was gonna use wood, but a concrete curb will last a long time, so I threw together a form.
We have lots of rocky debris so this will be slip form masonry with a top inch of strait cement.