0 past simple and past participle of zone --
1 to give a special purpose to a particular area, such as an area in a town: --
The former dockyard has been zoned for industrial use.
The present model describes one mechanism by which such zoned deposits may be generated by disequilibrium growth kinetics and remote solidification.
Feldspar, generally zoned, is common as phenocrysts and megacrysts.
Many clinopyroxene phenocrysts are zoned, with actinolite in some cores.
The dominant oscillatory zoned zircon is variably preserved, with areas of recrystallization common.
They are more iron-rich in the central gabbroic pegmatite where there is a tendency for the grains to be less zoned.
Ignimbrites of comparable bulk composition in this geological setting are usually part of zoned sheets and/or frequently very crystal-rich.
They are twinned and/or zoned short prismatic crystals that often form groups or clusters, accompanied by oxide inclusions.
They are well zoned and, in some cases, contain cores.
