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Roundness and surface features of quartz grains in Middle Devonian deposits of the East Baltic and their palaeogeographical implications
East Baltic Devonian roundness of detrital particles surface texture of quartz
2009/10/21
The roundness and surface texture of quartz grains were studied in Devonian sediments of 32 drill cores. Roundness was estimated in more than 800 samples and surface textures were examined under scann...
Submicroscopic Structure of Fe-Coatings on Quartz Grains in Tropical Environments
Electron Microscopy Fe-coating Fe-nodules Fe-oxide Forms Submicroscopic Structure Ultrathin Sections X-ray Microprobe Analysis
2011/12/27
Formation of Fe-coatings or segregation at the expense of quartz grains is a common process in the tropical environment. Limited information is available about their internal structure at the submicro...