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Sediments and Phytoplankton Near Volga Delta in Northern Caspian Sea

46.1N 50.9E

May 11th, 2013 Category: Lakes, Rivers, Sediments

Russia – May 10th, 2013

 This image shows the Volga Delta and the northern part of the Caspian Sea, bright green and blue from sediments and phytoplankton. The sedimentation rates and the types of recent deposits in the Northern Caspian Sea are governed mainly by the abundant Volga discharge.

Investigations based on a complex of techniques revealed that the modern deposits in the Northern Caspian Sea involve terrigenous sands and aleurites with an admixture of detritus and intact bivalve shells, including coquina. Generally, these deposits overlay dark grayish viscous clays.

A similar geological situation occurs in the Volga delta; however, the local deposits are much poorer in biogenic constituents. Illite prevails among the clay minerals. The heavy transparent minerals are represented in the coarse aleurite fraction mostly by epidotes, while quartz and feldspars represent the lighter minerals. The sedimentary material in the Volga delta is far from completely differentiated into fractions due to the abundance of terrigenous inflows, which exceed the energy potential of the river (click here for more information).

Dust Over Caspian Sea South of Volga Delta

39.4N 53.1E

April 4th, 2013 Category: Dust Storms, Lakes, Rivers

Caspian Sea – April 2nd, 2013

Plumes of dust blow northwestward off the eastern shores of the Caspian Sea. One plume blows across the lower part of Karabogas Bay, while the other, slightly further south, blows across the peninsula on which the city of Hazar is located, in Turkmenistan. Visible in the northern part of the sea are sediments and phytoplankton growth near the fan-shaped Volga River Delta.

Sediments and Phytoplankton Near Volga Delta – October 22nd, 2012

44.2N 49.4E

October 22nd, 2012 Category: Image of the day, Lakes, Phytoplankton, Rivers, Sediments

Caspian Sea – October 21st, 2012

Sediments and phytoplankton growth color the northern part of the Caspian Sea. While those in the central part of the northern lobe appear milky blue in color, those along the upper shoreline appear bright green. The latter are seeping out of the Volga River Delta, visible as a brown and green fanshaped area on the left side of the image.

Dust Blowing Across Caspian Sea, South of Volga Delta – June 1st, 2012

45.9N 49.6E

June 1st, 2012 Category: Dust Storms, Lakes, Rivers, Sediments

Caspian Sea - May 31st, 2012

A plume of dust blows across the Caspian Sea. In the full image, it can be seen extending westwards, almost reaching the Black Sea. The dust does not reach north to the Volga Delta, visible at the top of the image. Sediments from the Volga River can be seen pouring through the delta and into the northern part of the sea, encouraging phytoplankton growth and coloring its waters bright green.

Wildfire in Volga Delta by Caspian Sea

45.9N 48.2E

May 9th, 2012 Category: Fires, Rivers

Caspian Sea - May 6th, 2012

Smoke from a wildfire can be seen near the center of the Volga Delta, by the shores of the Caspian Sea. The plume of smoke from the fire was blowing in a straight line towards the northwest at the time this image was captured. Visible to the east are sediments and algal growth coloring the northern section of the Caspian Sea bright shades of green and blue.

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