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.
Where the river system is joined by lateral streamsâthe Virgin, Kanab, Paria, Escalante, Dirty Devil, and Green rivers from the west, and the Little Colorado, San Juan, Dolores, and Gunnison from the eastâa transverse system of narrow, winding deep canyons has been cut.