How'd you do this?

Yesterday, I had a backhoe in to complete the ripping out of caliche. A front end loader with a box ripper wasn't getting it. So, now, we're down about a foot from the top of the adjacent slab. This is an eight foot wide sixty foot run.
I want to put pavers to continue out level with the flatwork next to the house. This area is a catch basin during heavy rains. My intent is to fill up starting with about 4" with gravel, put landscape cloth, then the brick sand to grade, roll it flat, then a layer of pavers.
What size of gravel would you use? And what is the name of the dark sand that is used as base for pavers?
I have a 10' x 2' x 18" deep trench at the low end of this to carry the water out of the yard, and over a nearby cliff. I would use a perforated pipe in that, set in gravel, and covered with landscape cloth except for the top 6" or so.
Ideas? Comments?
Thanks in advance.
Steve
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caliche - what's that?
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http://cals.arizona.edu/pubs/garden/mg/soils/caliche.html
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You know; caliche!!!
Build a pool in the desert and it may add 20K to the bill, for caliche removal.
Not work for the sick, lame or lazy. -- Oren
"The voices in my head may not be real, but they have some good ideas!"
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