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Colorado River Mouth and Gran Desierto de Altar, USA and Mexico – November 24th, 2011

31.9N 114.4W

November 24th, 2011 Category: Deserts, Image of the day, Rivers, Volcanoes

Mexico - November 23rd, 2011

The Colorado River is a river in the Southwestern United States and northwestern Mexico, approximately 2,330 kilometers (1,450 mi) long. Here, it can be seen at its mouth, empyting tan sediments into the Gulf of California between the Baja California peninsula and mainland Mexico.

Visible extending across much of the northern border of the Gulf of California, is the Gran Desierto de Altar. One of the major portions of the Sonoran Desert of Mexico, including the only active erg dune region in North America, it reaches more than 100 kilometers east to west, and over 50 km north to south.

The dark brown area amidst the desert sands is the Pinacate Peaks (Sierra Pinacate), a group of volcanic peaks and cinder cones located mostly in the Mexican state of Sonora along the international border adjacent to the U.S. state of Arizona, surrounded by the vast sand dune field of the Gran Desierto de Altar, at the desert’s southeast.

Agriculture Between Salton Sea and Gran Desierto de Altar, USA and Mexico – July 27th, 2010

31.8N 113.6W

July 27th, 2010 Category: Image of the day, Lakes, Rivers, Volcanoes

Mexico - June 23rd, 2010

Mexico - June 23rd, 2010

Greenish sediments flow forth from the Colorado River, around Montague Island, and into the Sea of Cortes, left of the image center. Upon opening the full image, more of the sea and the Baja California peninsula in Mexico can be observed.

Near the north shores of the sea is the Gran Desierto de Altar, part of the Sonoran Desert. The dark brown circular area amidst the tan dunes is the Pinacate Peaks (Sierra Pinacate), a volcanic group of volcanic peaks and cinder cones.

Following the river northwards, one comes to an irrigated area in this arid region – the Imperial Valley in southern California. Continuing northwards through the agricultural zone, one finds the Salton Sea, a saline lake. The largest such lake in California, it covers a surface area of approximately 376 sq mi (970 km2).

Agriculture by Salton Sea and in Mexicali Valley, USA and Mexico – May 11th, 2011

32.6N 115.4W

May 11th, 2011 Category: Deserts, Image of the day, Lakes, Rivers, Sediments

Mexico - May 1st, 2011

The Salton Sea, a large lake near the California-Mexico border, can be observed in the upper left quadrant of this image.

South of the sea is a large agricultural area that stretches towards the Sea of Cortez (Gulf of California). This green, field-covered area is interrupted by the grey of the city of Mexicali, the capital of the Mexican state of Baja California, situated on the U.S.-Mexico border adjacent to Calexico, California.

The Mexicali Valley is one of the largest and most fertile valleys in Mexico. The Valley has over fifty different crops and is similar to the Imperial Valley in its agricultural production. The Mexicali Valley is a primary source of water for the region, having the largest irrigation district in Mexico.

Continuing southeastward past the agricultural zones, one comes to the sandy Desierto de Altar and then to the Sea of Cortez. Sediments from the Colorado River spill into the northern end of the sea.

From the Salton Sea to the White Sands Dune Fields, Mexico and USA

31.7N 111.7W

April 27th, 2011 Category: Deserts, Image of the day, Lakes, Rivers

Mexico - April 15th, 2011

The Salton Sea appears as a small, dark blue, pear-shaped  mark in near the upper left corner of this thumbnail image near the California-Mexico border, although it and the agriculture to the south of it can be viewed in great detail in the full image.

Continuing southeastward along the agricultural zones, one passes the sandy Desierto de Altar before coming to the Sea of Cortez (Gulf of California), whose northermost reaches are green due to the influx of sediments from the Colorado River.

Moving over to the upper right corner, in New Mexico, one can see the White Sands National Monument, a white sand dune field, and the Carrizozo Malpais, a large lava flow that appears as a dark brown line north of the dune field. Both are best observed in the full image.

Geographical Features In and Around the Sea of Cortez, Mexico and USA – March 6th, 2011

29.2N 113.4W

March 6th, 2011 Category: Deserts, Image of the day, Sediments

USA and Mexico - February 11th, 2011

The northern end of the Sea of Cortez (or Gulf of California), in Mexico, appears greenish due to an influx of sediments from the Colorado River. The two large islands in the sea, to the south, are Isla Ángel de la Guarda (left), also called Archangel Island, and Tiburón Island (right).

Returning to the northern end of the sea, one can observe the sandy Gran Desierto de Altar to the northeast, while to the northwest lies an agricultural area and the Salton Sea, a lake in California, near the Mexican border.

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