Wheeler Diagrams from The Mini Basin (by Matt Kuchta)
Small basin (built from instructions by T. Hickson, Univ. of St. Thomas) run with relatively constant sediment input, but variations in base level to produce variations in sedimentary “packages” which are then traced onto a graph of lateral extent vs. time (wheeler diagram).
California Desert 44 (by Adolfo Isassi)
The “magic” hour for canyons is not the same as the for open landscapes. It is different for every canyon. If I do not have the advantage of scouting the location beforehand, I use satellite imaging to see form above the canyon orientation relative to the traveling sunlight. Copyright: Adolfo Isassi.
Fuente: Flickr / adolfo_isassi
Structural Colors (by zeesstof)
The slightly odd angle of the pale aeolian rocks here is the result of the interaction between two big faults. The inclined block between them is, in this case, a Relay Ramp. Partly because of the faults and partly due to erosion of the altered rock, the sediments show a multitude of reds, greens and other colors here.
Fuente: Flickr / zeesstof
Stratigraphy of Kasimov Crater Fill (by Lunar and Planetary Institute)
This image shows layered sedimentary rocks and ripples that fill and surround Kasimov crater. These layered deposits may have formed through the accumulation of sediment that was transported into this crater by blowing wind. The crater interior contains a sequence of layers that are remnants of the material that originally infilled the crater. These sediments form an extensive deposit that once covered the floor of the surrounding larger crater.
While on a recent trip to the Canadian Rockies, we could not pass up a trip on the snowcoach, the bus that takes tourists out onto a safe bit of Athabasca Glacier, part of the larger Columbia Icefields. I was hugely impressed with the extent of the glacier’s retreat since my first visit in 1962. When we arrived at the safe spot (…) I found this lovely bit of otherwise undistinguished lateral moraine. The light couldn’t have been more dramatic as it highlighted the erosion on the loosely packed till. The surface of the glacier itself is seen at the bottom of the photo. Photo taken September 24, 2009. Credit: Stu Witmer. (via EPOD)
After an earthquake, heavier sand set loose in landslides settles first, while water is still sloshing around, forming recognizable patterns; thicker layers of mud settle on top in calmer waters over a longer time. This core was taken from the sea floor in the Canal de Sud, off the coast of Hispaniola. Source: McHugh et al., 2011. (via LDEO)
Earth from Space: Madagascar jellyfish (by europeanspaceagency)
The Betsiboka estuary in northwest Madagascar is pictured in this image. Here, the country’s largest river flows into Bombetoka Bay, which then opens into the Mozambique Channel. The red colouring of the sandbars and islands between the ‘jellyfish tentacles’ comes from sediments washed from hills and into the streams and rivers during heavy rain. The seaport city of Mahajanga can be seen in the upper-left corner of the image. Japan’s ALOS satellite captured this image on 17 September 2010 with its AVNIR-2 Advanced Visible and Near Infrared Radiometer. Credits: JAXA, ESA.
Fuente: Flickr / europeanspaceagency
Depending on the part of the ocean, if you were to scoop up a tablespoon of the luscious brown sediments at the seafloor, you would find roughly one million to one billion microbes living in it! If you were to dig deeper down into those sediments, let’s say 10-100 meters or so, you would still find thousands to millions of cells in each tablespoon you dug up. Now, considering that 70% of Earth’s surface is covered by oceans, and that a large part of the seafloor underneath that is covered with some sediments, well then you end up with a massive blanket of sediments chock full of microbes. In fact, some researchers have calculated that marine sediments contain roughly 10 to the power of 30 microbes, which translates to more than half of all microbes on Earth and roughly one-third of all living carbon on Earth (Whitman et al. 1998). Can you believe it?! That’s a huge fraction of life on Earth ‘buried alive’ at the bottom of the ocean.