GeoLog

Geomorphology

Back for the first time: measuring change at Narrabeen–Collaroy Beach

May 8, 2019
Back for the first time: measuring change at Narrabeen–Collaroy Beach
Narrabeen–Collaroy Beach in New South Wales, Australia, home to one of the longest-running shoreline-measurement programmes in the world! Credit: Eli Lazarus

Narrabeen–Collaroy Beach in New South Wales, Australia, just north of Sydney, is home to one of the longest-running shoreline-measurement programmes in the world. With colleagues at the University of New South Wales (UNSW) Sydney, Eli Lazarus, an associate professor in geomorphology at the University of Southampton, UK, has been analysing over 40 years of data from Narrabeen–Collaroy to better und ...[Read More]

Could beavers be responsible for long-debated deposits?

May 3, 2019
Could beavers be responsible for long-debated deposits?
The evidence: a beaver dam and surrounding swamp in Lithuania. Credit: Jūsų darbas via Wikimedia Commons

Following her presentation at the European Geosciences Union General Assembly in Vienna, I caught up with geomorphologist and environmental detective Annegret Larsen from the University of Lausanne, Switzerland, about beavers, baffling sediments and a case she’s been solving for the past seven years. Back in 2012 the German geomorphology community was seriously debating the source of buried black ...[Read More]

Imaggeo on Mondays: High above the top of Europe

March 25, 2019
Imaggeo on Mondays: High above the top of Europe
High above the top of Europe. Credit: Julien Seguinot (distributed via imaggeo.egu.eu)

Sentinel-2B imaged the highest mountains of western Europe, just the moment an airplane was about to fly over the granite peaks of Grandes Jorasses and cross the border from France to Italy. The passengers on the right side of the plane must have enjoyed a spectacular view on Mont Blanc, just nine kilometers away to the south-west, and Mer de Glace, the longest glacier in France flowing down from ...[Read More]

Imaggeo on Mondays: Sunset on the Giant’s Causeway

January 14, 2019
Imaggeo on Mondays: Sunset on the Giant’s Causeway
Sunset on The Giant's Causeway. Credit: Osip Kokin (distributed via imaggeo.egu.eu)

Pictured here is the Giant’s Causeway – a region of basalt columns, created 50-60 million years ago during the Paleogene. The typical polygonal form of the bedrocks, a product of active volcanic processes from the past, is well underlined by the sunset’s light; that’s why I took the photo in the late evening. The separate cracks are extended by weathering over time and are filled eluvi ...[Read More]