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Scanning Electron Microscopy of Opaque Opaline Forms Isolated from Forest Soils in Ohio
Author(s) -
Wilding L. P.,
Drees L. R.
Publication year - 1973
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1973.03615995003700040047x
Subject(s) - opacity , scanning electron microscope , deciduous , spheres , electron microscope , mineralogy , materials science , chemistry , botany , optics , biology , physics , composite material , astronomy
Opaque opal bodies isolated from surface horizons (A1) of three Miamian soils were examined with correlative light optical and scanning electron microscope techniques. Opaque bodies comprise from 15 to 70% of the opal isolated from these horizons and range in morphology from spheres to nondescript equidimensional, rod, or elongated forms. Under transmitted light only the gross morphological outline can be deduced. However, with the scanning electron microscope a strong similarity exists between many of the opaque bodies and spheres, cups, mosaic aggregates, and bladed opaline forms isolated from reference deciduous tree leaves. Some of the opaque forms provide positive differentiation of grass vs. forest origin of the opal.