An increase in the value of one currency in terms of another. Currencies appreciate against each other for various reasons, including capital inflows and the state of a country's current account.
Read Powellâs account of the first ever river expedition through the Grand Canyon in The Exploration of the Colorado River and Its Canyons, issued as a Penguin Classic in 2003.
The Grand Canyon is one of the worldâs most awesome erosional features. It is 277 miles (446 km) long, including the 60 miles (96 km) of Marble Canyon upstream.The depth of the main segment of the Grand Canyon varies between 3,000 and 6,000 feet (900 and 1,800 m), with the rim-to-rim width between 4 and 18 miles (6 and 29 km).Its origin has plagued geologists since the time of John Wesley Powellâs first courageous voyage down the Colorado River in 1869.n example of how quickly water can erode through the formations of the Grand Canyon region took place on June 28, 1983, when the pending overflow of Lake Powell required the use of the Glen Canyon Damâs 40-foot (12-m) diameter spillway tunnels for the first time.