Geomorphology

Imaggeo on Mondays: A prehistoric forest

Laura Roberts-Artal September 11, 2017

1.6 hectares of wilderness. Give me more . Credit: Vytas Huth (distributed via imaggeo.egu.eu)

This stunning vista encompasses the south-western wilderness of Tasmania as seen from the Tahune air walk 60 m above the Huon river valley. In front lies the beginning of a huge UNESCO World Heritage Site, covering almost a fourth of the area of Tasmania. The site mostly consists of a pristine, temperate rainforest of Gondwanan origin that is home to the tallest flowering trees in the world; Eucal ...[Read More]

Imaggeo on Mondays: Viñales Valley

Laura Roberts-Artal September 4, 2017

Vinales Valley . Credit: Alexis Merlaud (distributed via imaggeo.egu.eu).

From last week’s unusual desert landscape to this week’s lush valley in Cuba… The picture shows the Vinales Valley, a karstic depression with mogotes in western Cuba. Karst is the general term for landscapes formed when limestone is disolved by carbonic acid, in rain water. This leads, in particular, to the formation of an underground network of caves and rivers. In the tropics, ...[Read More]

GeoSciences Column: When could humans last walk, on land, between Asia & America?

Laura Roberts-Artal August 25, 2017

Map showing the Chukchi Sea, north of the Bering Strait and Sea, between Russia and the United States. Credit: NormanEinstein, distributed via Wikimedia Commons.

Though now submerged under 53 m of ocean waters, there once was a land bridge which connected North America with Asia, allowing the passage of species, including early humans, between the two continents. A new study, published in the EGU’s open access journal Climate of the Past, explores when the land bridge was last inundated, cutting off the link between the two landmasses. The Bering Strait, a ...[Read More]

Imaggeo on Mondays: A dramatic avalanche from Annapurna South

Laura Roberts-Artal August 7, 2017

A dramatic avalanche from Annapurna South . Credit: Emily Hill (distributed via imaggeo.egu.eu)

The Annapurna massif is located in an imposing 55 km long collection of peaks in the Himalayas, which behave as a single structural block. Composed of one peak (Annapurna I Main) in excess of 8000 m, a further thirteen peaks over 7000 m and sixteen more of over 6000 m, the massif forms a striking structure within the Himalayas. Annapurna South (pictured in today’s featured image), the 101st talles ...[Read More]