enriched oxidation zone

front of the oxidation zone

i nterlayered oxidation zone

interlayer oxidation zone sandstone type uranium deposit

interlayer oxidation zone sandstone-type uranium d

Methane oxidation zone

oxidation zone betwetn phreatic layers

paeo and present interlayer oxidation zone

paleo interlayer oxidation zone

phreatic interlayer oxidation zone

supergene oxidation zone

U oxidation zone

yellow interlayer oxidation zone

clear zone zone

secondary sulphide zone

sulphide zone

copper sulphide deposits

the alternative occurrence of fractured zone and non-fractured zone

trade-wind zone [= zone of trade wind]