Alma de Groot, The Netherlands Dunes are wind-generated accumulations of sand particles present in desert or coastal land. Sand dunes have smooth and uniform forms, although geometry may be highly variable. The size of particles of sand dunes is highly concentrated around 0.2 mm in diameter due to wind transportation. The pattern showed in the picture is the result of the formation of aeolian dune ...[Read More]
Soil pictures
Soils at Imaggeo: Welcome to Stony Soil Country
Artemi Cerdà University of Valencia, Valencia, Spain Antonio Jordán University of Seville, Sevilla, Spain In the Mediterranean, soil erosion causes rock fragments to surface easily, so that stony soils are very common. The stones on the ground are collected and used for the construction fences (dry stone walls) and separating properties by farmers. In most cases, fences are built without any morta ...[Read More]
Soils at Imaggeo: when a soil is born
Artemi Cerdà, University of Valencia, Valencia – Spain Soil development is based on the weathering of rocks and the deposition and decomposition of litter and roots, which are the main source or soil organic matter. Mosses are one of the key actors on those processes, as they are present at the initial stages of pedogenesis. This post was also published simultaneously in G-Soil.
Soils at Imaggeo: Sand dunes at the east shore of Lake Michigan, USA
Simon Schneider, R&D Programme GEOTECHNOLOGIEN , Potsdam – Germany The coastal sand dunes along the eastern shore of Lake Michigan make up the largest collection of freshwater coastal dunes in the world. They provide valuable information that will help to manage and protect them and yields important insights into both the development of coastal dunes in general and climate change in Mich ...[Read More]
Soils at Imaggeo: Pores in ‘heart-shaped’ pyrite aggregate in clay
Susanne Hemes (RWTH Aachen University, Germany) The image was taken using a ‘Zeiss – Supra55’ Scanning Electron Microscope at 15,000x magnification and 10kV electron acceleration voltage, as part of my PhD work on the porosity in fine- and coarse-grained Boom Clay samples. The picture shows pores in framboidal pyrite aggregates, embedded in a fine-grained clay matrix. Boom Clay i ...[Read More]