A miniature version of the Nile River, seen on Saturn’s moon Titan by the international Cassini mission. The river valley stretches more than 400 km from its ‘headwaters’ to a large sea, and likely contains hydrocarbons. The image was acquired on 26 September 2012, on Cassini’s 87th close flyby of Titan. The river valley crosses Titan’s north polar region and runs into Kraken Mare, one of the three great seas in the high northern latitudes of the moon. Credit: NASA/JPL–Caltech/ASI. (via ESA Space Science)
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A miniature version of the Nile River, seen on Saturn’s moon Titan by the international Cassini mission. The river valley stretches more than 400 km from its ‘headwaters’ to a large sea, and likely contains hydrocarbons. The image was acquired on 26 September 2012, on Cassini’s 87th close flyby of Titan. The river valley crosses Titan’s north polar region and runs into Kraken Mare, one of the three great seas in the high northern latitudes of the moon. Credit: NASA/JPL–Caltech/ASI. (via ESA Space Science)

Fuente: esa.int

The image above shows the eastern part of Grand Canyon National Park in northern Arizona, near 36 degrees north latitude and 112.1 degrees west longitude. It is a composite of two pieces: a synthetic natural color image captured on July 14, 2011, draped over a three-dimensional model of the area. The images and stereoscopic data behind the model were acquired by the Advanced Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra spacecraft. The perspective is from east to west, looking down the channel of the Colorado River. North is to the right. In this view, the canyon spans 9 miles (14.5 kilometers) at its widest point and 5,600 feet (1,707 meters) from rim to river bed. The North Rim and Walhalla Plateau stand out on the right side, while Grand Canyon Village rests on the high plateau at upper left. (vía NASA Earth Observatory)
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The image above shows the eastern part of Grand Canyon National Park in northern Arizona, near 36 degrees north latitude and 112.1 degrees west longitude. It is a composite of two pieces: a synthetic natural color image captured on July 14, 2011, draped over a three-dimensional model of the area. The images and stereoscopic data behind the model were acquired by the Advanced Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra spacecraft. The perspective is from east to west, looking down the channel of the Colorado River. North is to the right. In this view, the canyon spans 9 miles (14.5 kilometers) at its widest point and 5,600 feet (1,707 meters) from rim to river bed. The North Rim and Walhalla Plateau stand out on the right side, while Grand Canyon Village rests on the high plateau at upper left. (vía NASA Earth Observatory)

Fuente: earthobservatory.nasa.gov

Columnar basalt along the edge of the Bras de la Plaine River on the island of Reunion. More basalt is in the Earth’s crust than any other rock and oceanic hotspots, such as Reunion, are primary locations for basalt to occur. The Bras de la Plaine runs through the basalt plateau between the two volcanoes that form the oval-shaped island. The western volcano, Piton des Neiges (“Snow Peak”), has been dormant for 12,000 years. The eastern end of the island is dominated by the shield volcano Piton de la Fournaise (“Furnace Peak”), one of the most active volcanoes on Earth. More than 40% of the island is part of the Reunion National Park and is on UNESCO’s World Heritage List of significant places. Photo taken July 14, 2011. Credit: Vincent Dunogue, Stu Witmer. (via EPOD)
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Columnar basalt along the edge of the Bras de la Plaine River on the island of Reunion. More basalt is in the Earth’s crust than any other rock and oceanic hotspots, such as Reunion, are primary locations for basalt to occur. The Bras de la Plaine runs through the basalt plateau between the two volcanoes that form the oval-shaped island. The western volcano, Piton des Neiges (“Snow Peak”), has been dormant for 12,000 years. The eastern end of the island is dominated by the shield volcano Piton de la Fournaise (“Furnace Peak”), one of the most active volcanoes on Earth. More than 40% of the island is part of the Reunion National Park and is on UNESCO’s World Heritage List of significant places. Photo taken July 14, 2011. Credit: Vincent Dunogue, Stu Witmer. (via EPOD)

Fuente: epod.usra.edu

inlovewithgeosciences: Karst landscape geology “Cutaway artwork showing the features of a karst limestone landscape formed by erosion. The limestone rock has been shaped by natural chemical erosion. Carbon dioxide in the air dissolves in rainwater to form carbonic acid. This acid erodes the limestone rock as the water flows over it. At far right, a river flows down into the ground to form an underground river (across bottom), emerging at lower left. Two layers of caves are shown, with water seeping down from above to form stalactites, stalagmites, which can join to form large pillars. At left, the rock has been exposed, forming a limestone pavement.”
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inlovewithgeosciences:

Karst landscape geology

“Cutaway artwork showing the features of a karst limestone landscape formed by erosion. The limestone rock has been shaped by natural chemical erosion. Carbon dioxide in the air dissolves in rainwater to form carbonic acid. This acid erodes the limestone rock as the water flows over it. At far right, a river flows down into the ground to form an underground river (across bottom), emerging at lower left. Two layers of caves are shown, with water seeping down from above to form stalactites, stalagmites, which can join to form large pillars. At left, the rock has been exposed, forming a limestone pavement.”

(vía it-sfullofstars)

Fuente: inlovewithgeosciences

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.
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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

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