orbicular structure वाक्य

उदाहरण वाक्य

1. Some of the diorite has orbicular structure, concentric spheres of plagioclase and hornblende rich zones form balls up to 20 cm in diameter.
2. In highly silicified rhyolite or tuff, quartz and feldspar crystallize in radial aggregates of needle-like crystals which provide the basis or " seed " for the orbicular structure seen in this kind of jasper.