GeoLog

EGU Scientific Divisions

Imaggeo On Monday: Desert Varnish, Antarctica Style

November 30, 2020
Imaggeo On Monday: Desert Varnish, Antarctica Style
Desert Varnish, Antarctica Style . Credit: Martha Cary Eppes (distributed via imaggeo.egu.eu)

This photograph highlights the oxidized surface of diorite boulders, which fall from the ice at the base of the Mullins Glacier in Beacon Valley, Antarctica when the ice moves directly from a solid state into a gas state, without becoming a liquid in between (a process called sublimation). The particular features (morphology) of the varnish and the desert pavement of this unique environment are re ...[Read More]

How many transdisciplinary researchers does it take to find out how an ocean sinks?

and November 27, 2020
How many transdisciplinary researchers does it take to find out how an ocean sinks?
The 14 early career (PhD students, postdocs and lecturers) members of the SZI Database team. (Photo credit CEED, University of Olso)

There is no shortage of increasingly uphill challenges in the current research landscape, especially for Early Career researchers: discouragingly long-standing science questions; minimal freedom for developing methodologies; invariably ambivalent proposal reviews; an academic grading scheme based mainly on publication productivity and impact; and enforced competition for few permanent research pos ...[Read More]

Imaggeo On Monday: Great Sand Dunes Sunset

November 23, 2020
Imaggeo On Monday: Great Sand Dunes Sunset
Great Sand Dunes Sunset . Credit: John Counts (distributed via imaggeo.egu.eu)

On a late afternoon in Colorado’s Great Sand Dunes, the sun came out from behind the clouds for a brief moment before it went behind the horizon, illuminating the stoss side of an eroding dune. Sand originated from lacustrine deposits in the San Luis Valley; the Sangre de Cristo mountains, which can be seen in the background, provided a source of some of the sand. This image therefore illust ...[Read More]

Using Milankovitch Cycles to create high-resolution astrochronologies

November 20, 2020
Using Milankovitch Cycles to create high-resolution astrochronologies
Image credit: Lon Abbott and Terri Cook

This year marks the 100th anniversary of Milutin Milankovitch’s first paper about Earth’s climate. Milankovitch argued that the amount of solar radiation Earth receives, and hence its climate, varies cyclically as its orbit changes due to gravitational tugs from the other planets. His climate theory fell into disrepute during the 1950’s but was rehabilitated in the 1970’s.   Today, many peopl ...[Read More]