Nothing captures beauty of Arizona’s landscape better than the Grand Canyon and its steeply-sided cliffs that have been carved by the Colorado River. This photo by Lukas Hoertnagl shows this stunning landscape as seen from Lipan Point in the Grand Canyon National Park. The early geological history of America is preserved in the strata that make up the Grand Canyon’s famed banded landscape, which i ...[Read More]
Imaggeo on Mondays: Grand Prismatic Spring
Yellowstone National Park, USA, is well known for its outstanding natural beauty. This is the Grand Prismatic Spring in the Midway Geyser Basin, Yellowstone National Park. It is the third largest hotspring in the world and the largest found in the United States, with a maximum diameter of about 90 m. It discharges roughly 2.5 cubic metres of mineral-rich water per minute, which flows down the rock ...[Read More]
Imaggeo on Mondays: Alas, allases are abound!
The Lena River flows throughout Russia from its source in the Baikal Mountains out into the Arctic Ocean, where the delta’s landscape is dominated by ice-rich Yedoma and thermokarst lakes. Thermokarst lakes have been identified as a source of carbon release to the atmosphere and Yedoma-like lake sediments are known to release more methane than any other sediment due to their incredibly high carbon ...[Read More]
Imaggeo on Mondays: Stirring up a sandstorm
These are the outwash plains for the Icelandic volcano, Katla: An outwash plain (or sandur) is a broad, shallowly sloping region ahead of a glacial front. They are made up of material that has been deposited by glacial meltwater, released either by geothermal heating or a subglacial eruption. The extensive volcanism and abundance of ice-capped volcanoes in southern Iceland means that the outwash p ...[Read More]