Abstract

Optically clear quartz crystals in the range of 20 mu m-63 mu m in diameter were etched in the laboratory and the surfaces were studied under a Scanning Electron Microscope. The photographs show a wide range of surface features. Naturally occurring quartz grains from St. Peter Sandstone were also studied for comparison. In addition to certain new surfaces, features from the same samples show a wide variation and hence cannot be used as indicators of sedimentary environments. Instead, X-ray mapping suggests that Mn distribution in the surface pits relative to outer surface can be used to identify the origin of pits either as mechanical or as chemical.

First Page Preview

First page PDF preview
You do not currently have access to this article.