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GFZ - German Research Centre for GeosciencesTephra, the Greek word for ash, is used to describe any material that is ejected by a volcano into the atmosphere (pyroclasts). Tephra includes dense blocks and bombs (> 64 mm), and lighter materials such as scoria, pumice and ash (< 2 mm). As one moves away from a volcano, the tephra deposits become finer grained (smaller particles) and thinner. This is because small airborne particles hover longer and stay within the atmosphere for a greater distance from the volcano. These particles of ash …
FU - Freie Universität BerlinThe preparation lab offers different preparation methods such as thin-section production, polishes, dye methods, hardening methods and others.
UP - University of PotsdamThe sample preparation laboratories provide facilities to prepare geological samples for a wide range of analytical methods. These include mineral separations for geochronologic analysis, mineral powders for geochemical analysis and polished thin sections for microscopy.
AWI - Alfred Wegener InstituteThe sedimentology lab at the Permafrost Research section aims to study the transport and accumulation processes of permafrost-related deposits and classify sediment sequences in general. Therefore, the following parameters are investigated: sediment structure description, grain-size distribution and mass specific magnetic susceptibility.