Commodity Code

frac sand

http://resource.geosciml.org/classifier/cgi/commodity-code/frac-sand

definition Frac sand is a high-purity quartz sand with very durable and very round grains. It is a crush-resistant material used in the hydraulic fracturing process to produce petroleum fluids, such as oil, natural gas and natural gas liquids from rock units that lack adequate pore space for these fluids to flow to a well. more like this
notation
01.01.06.02 more like this
Frsand more like this
source http://geology.com/articles/frac-sand/ more like this
type
Resource
Concept
broader sand
narrower frac sand
in scheme commodity code
is primary topic of frac sand