Imaggeo

Imaggeo On Monday: Patterns in the landform

Hazel Gibson June 29, 2020

Patterns in the landform. Credit: Basudev Biswal (distributed via imaggeo.egu.eu)

The badlands at the Zabriskie Point (Death Valley, California, USA) rest upon a mudstone foundation. In the prehistoric lakes of Death Valley, fine grained sediments were deposited to form soft rocks. The clay minerals in the mudstone are shaped like tiny plates, which helps create the layers. The combination of the almost impermeable mudstone and Death Valley’s low rainfall makes plant grow ...[Read More]

Imaggeo On Mondays: The valley along the fault

Cyril Mayaud June 22, 2020

The valley along the fault. Credit: Cyril Mayaud (distributed via imaggeo.egu.eu)

The Idrija fault is a an active fault crossing Slovenia for more than 100 km in a NW-SE direction and is responsible for several important geological features in the country. Among them, we can mention the former-active mercury mine of Idrija which has registered as a Unesco World Heritage site since 2012. Another example that demonstrates the impact of this fault is it’s effect on th ...[Read More]

Imaggeo On Mondays: Natural Arch

Alicia Morugán June 15, 2020

Natural Arch. Credit: Alicia Morugán (distributed via imaggeo.egu.eu)

This natural arch named Pirulico’s tower is located in Mojácar, situated in the south east of the Province of Almería (Andalucia) in southern Spain. A natural arch, natural bridge or, less commonly, a rock arch is a natural rock formation where a rock arch forms, with an opening underneath. Most natural arches form as a narrow bridge, walled by cliffs, become narrower from erosion, wi ...[Read More]

Imaggeo on Mondays: The Grid – A serpentine pseudomorph after carbonate

Kristina G Dunkel June 1, 2020

The Grid - A serpentine pseudomorph after carbonate. Credit: Kristina Dunkel (distributed via imaggeo.egu.eu)

The structures in this photo might look three-dimensional, but they are completely flat. It is a photo of a polished thinsection of a rock, taken through a petrographic microscope under cross-polarized light. The width of the image is just 2 mm. The brownish mineral around the edges is carbonate, the white to grey mineral in the centre is serpentine, a water-bearing silicate mineral. The different ...[Read More]