Scalloped margins are common among Io's mesas and plateaus, the result of sulfur dioxide sapping from Io's crust, producing zones of weakness along mountain margins.
12.
At the same time, residents of these oil-producing zones have complained that together, Shell and the Nigerian government have done little to develop the area.
13.
The bulk of the aid consists of 60 helicopters and training for three anti-narcotics army battalions that will push into guerrilla-controlled, drug-producing zones in southern Colombia.
14.
The Nab deposit in the Campeche Sound, Pemex's main oil-producing zone, contains a very heavy crude with an API gravity of 9, according to a Pemex document.
15.
Since its inception, Lane-Wells had generated most of its income from perforating services, but log interpretation had narrowed down producing zones, resulting in fewer perforations and less revenue.
16.
So in Oaxaca's coffee-producing zones, farmers are earning a little more than half what they did years ago, said Salomon Nahmad, director of an anthropological study center in Oaxaca.
17.
In the early 1950s, the Mexicali Valley became the biggest cotton-producing zone in the country and in the 1960s, production reached more than half a million parcels a year.
18.
The Songliao Basin contract gives Esso China Limited the right to explore and develop horizons located beneath currently producing zones in the western and northern portions of the basin.
19.
The field is within a layer-cake of Pliocene-and Miocene-age sediments, with multiple producing zones stacked vertically, each zone within a permeable rock layer separated from the others by impermeable layers.
20.
In one of the most serious official signs of concern for the security situation, authorities announced Monday that they were quarantining four oil and gas-producing zones vital to Algeria's economy.
