Mi(ni)Geo

Uummannaq Island seen from the east in the evening. (via Jason Box)

Mount Kilimanjaro’s peak in north-eastern Tanzania captured by the US-operated GeoEye-1 satellite. Mount Kilimanjaro rises from the plains to an elevation of 5,895 metres, the highest in Africa and the world’s largest free-standing mountain - it is also an active volcano. Credit: GeoEye / SPL / Barcroft Media. (via Telegraph)

Damavand volcano, Iran. A nice cap cloud can be seen at the top of the mountain. Cap cloud is an orographic cloud that is formed over a mountain peak, formed by the cooling and condensation of moist air climbing up and over the peak. Cap clouds appear to remain stationary. Photo: Mostafa Ganjian. Commentary: Konstantinos Kourtidis. (via Imaggeo)

(via joshsquash)

August GSA Today cover photo: The Three Sisters are iconic sandstone towers exposed above the Jamison Valley in the Blue Mountains, Australia. Erosion in the mountains is dominated by stream channels cutting through exposed joints and preferential erosion of weaker shale units interbedded within the Triassic-aged sandstone. See “Understanding Earth’s eroding surface with 10Be”, by Portenga & Bierman, p. 4–10. Photo by Eric Portenga.

Mount Gould rises above the Grinnell Glacier cirque, in Glacier National Park. The bedrock consists of carbonate and clastic sedimentary rock of the Belt Supergroup, deposited during the Late Proterozoic. The prominent dark band in the middle of the cliff is the Purcell sill, an igneous rock that intruded the sedimentary rock; the light-colored areas on either side of the sill are zones bleached white from the interaction of the hot igneous rock with the carbonate rock. The cliff itself and the lake-filled depression define a bowl-shaped region called a cirque, which along with the striations in the lower left of the photo, are products of glacial erosion. Image taken July 2004. Credit: Marli Miller. (via EPOD)

View of Torres del Paine granite intruded by vertical dikes, flanked by moraines, reflected in the proglacial lake. Credit: Simon Gascoin. (via Imaggeo)