AERIAL VIEWS OF AFRICA
EXPLORATION PHOTOGRAPHY OF GEORGE STEINMETZ NATIONAL GEOGRAPHIC PICTURES : DINESH VORA 
[1]Evoking a scene from biblical times, caravans arrive at the salt mines of Lake Asele, 381 feet below sea level. For centuries salt blocks, called amole, were used throughout Ethiopia as money. 
[2]
Workers at Lake Afrera process raw salt. Production was temporarily halted last year when a volcano in neighboring Eritrea erupted, blanketing the salt in ash. 
[3]
At a salt-extraction facility in northern Ethiopia, briny water is pumped from hypersalty Lake Afrera into evaporation ponds. 
[4] Ancient lava flows near the Awash River in Ethiopia resemble the vertebrae of a fossilized beast. 
[5]
Sulfur and algae turn hot springs into pools of living color. The water is condensation from hot gases rising from magma chambers. As the water evaporates, salts and minerals form a vivid crust. 
[6]
Groundwater heated to boiling goes up in steam
at a geyser field northwest of Lake Abbe. 
[7]
A lake of lava bubbles atop Erta Ale, the region's most active volcano. 
[8] Restless faults have tilted these massive slabs of bedrock like dominoes. One of the canyons provides a highway corridor for truck traffic moving between Ethiopia and Djibouti. 
[9]
Sculpted by winds that consistently blow from east to west, sand dunes called barchans migrate across an ancient seafloor, rising about six feet and spreading 20 to 30 feet across. 
[10]
Ramparts of salt, mud, and potash, some 80 feet tall, rise above a maze of canyons and crags on the flank of Dallol Mountain. The tortuous shapes are the work of storms and flash floods.
[11]
Spires called travertine chimneys are fashioned by mineral-bearing vapor rising from underground magma chambers. As the vapor evaporates, it deposits minerals around each vent.
 [12]
Djibouti's Lake Assal is one of the world's saltiest lakes. Intense heat and strong winds fuel rapid evaporation, leaving a bathtub ring of minerals around the lake's shore 
[13]
Lake Assal marks Africa's lowest point, 512 feet below sea level. A Djibouti-based salt-production company calls the lake the "largest undeveloped salt reserve in the world." | 
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