dunes

Imaggeo on Mondays: Great sand dunes and beyond

Meriel J. Bittner November 18, 2019

Great Sanddunes and beyond. Credit: Meriel J. Bittner (distributed via imaggeo.egu.eu)

Driving eastwards through the San Luis Valley in south central Colorado, United States, the Great Sand Dunes emerge at the foot of the Sangre de Cristo Range in the northeast of the region’s upland plain. The origin story of these great dunes begins during a time of glacial melt, five to three million years ago, when the rivers of the surrounding mountains filled the basin with water and sediments ...[Read More]

Imaggeo on Mondays: A modern cliff hides ancient dunes

Olivia Trani October 22, 2018

Ancient Dune, Modern Cliff Credit: Robert Wu (distributed via imaggeo.egu.eu)

Ancient sand dunes exposed off a cliff face on the shoreline of Nova Scotia at the Islands Provincial Park. The juxtaposition of the high angled strata and flat lying layers above revels the drastic change in climate in Nova Scotia’s history; from vast sand dunes to a calm lake system, and presently the western coastline of the Atlantic Ocean. Description by Robert Wu, as it first appeared o ...[Read More]

Imaggeo on Mondays: Of ancient winds and sands

Elizaveta Kovaleva November 6, 2017

Movement of ancient sand . Credit: Elizaveta Kovaleva (distributed via imaggeo.egu.eu)

Snippets of our planet’s ancient past are frozen in rocks around the world. By studying the information locked in formations across the globe, geoscientist unpick the history of Earth. Though the layers in today’s featured image may seem abstract to the untrained eye, Elizaveta Kovaleva (a researcher at the University of the Free State in South Africa) describes how they reveal the secrets of anci ...[Read More]

Imaggeo on Mondays: Coastal erosion

Laura Roberts-Artal August 15, 2016

Stabilising dune vegetation . Credit: James Terry (distributed via imaggeo.egu.eu)

Coastlines take a battering from stormy seas, gales, windy conditions and every-day wave action. The combined effect of these processes shapes coastal landscapes across the globe. In calm weather, constructive waves deposit materials eroded elsewhere and transported along the coast line via longshore-drift, onto beaches, thus building them up. Terrestrial material, brought to beaches by rivers and ...[Read More]