Materials - Caliche (dirt)

caliche - is a dirt that covers 60% of Texas' surface (Logan @ A&M)

A crude sodium nitrate occurring naturally in Chile, Peru, and the southwest United States, used as fertilizer.
[American Spanish, from Spanish, pebble in a brick, flake of lime, from cal, lime, from Latin calx, calc-, lime; see calx.]
definition by freedictionary.com


I took some home. 

and separated it into respective components: 

thin layer of lime 

water

the rest

and then various 

pieces of rubbish

paper

plastic

textile

glass

and stones, 

which I separated into 

categories by colour

for now.