Commodity Code

shell grit

http://resource.geosciml.org/classifier/cgi/commodity-code/shell-grit

definition Shell grit is coarsely ground or broken seashells. It is used, among other things, by birds as a source of calcium for egg shell production, and to aid digestion. more like this
notation
01.01.04.08 more like this
ShGri more like this
source http://en.wikipedia.org/wiki/Shell_grit more like this
type
Resource
Concept
broader industrial rock
narrower shell grit
in scheme commodity code
is primary topic of shell grit