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Replacement of Quartz by Opaline Silica during Weathering of Petrified Wood
Opal-A Opal-CT Petrified wood Quartz Silica Weathering
2012/2/2
A mineralogical investigation by X-ray powder diffraction and optical, scanning, and transmission electron microscopy of partially weathered petrified wood in the Yegua Formation (Eocene) of east-cent...
Laminar Opaline Silica from Some Volcanic Ash Soils in New Zealand
Andosols Opaline silica Volcanic ash soils Weathering
2011/11/22
Laminar Opaline Silica from Some Volcanic Ash Soils in New Zealand.