U.S. oil and gas fields double in size

Article Abstract:

The US Geological Survey's 1995 estimate of US oil and gas reserves improved greatly from the gloomy 1989 estimate. Inferred reserves of oil tripled, to 60 billion barrels, and inferred gas reserves rose to 322 trillion cubic feet. Estimates of as-yet-undiscovered oil and gas have not changed.

Reports, Petroleum, Petroleum reserves, United States. Geological Survey, Natural gas, Natural gas reserves

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Missing chunk of North America found in Argentina

Article Abstract:

Paleogeographers believe that North America was located more closely to South America and in a different position 500 million years ago. The revised thinking results from the discovery of crust in Argentina that has distinct features to North American crust.

Argentina, Observations, North America, Paleogeography

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Why the West stands tall

Article Abstract:

NThe mountains of western North American, including the Sierras and the Rockies, defy the usual pattern of crustal upheaval caused by continental collisions. New research indicates that the Rockies' roots are deep in the earth's mantle.z

Earth, Western States, Origin, Mountains, Mantle (Geology)

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