Featured Article: How the Ice Age Worked
Much of the ice has melted, and the woolly mammoths are long gone. But could we still be in an ice age and headed for another? See more »
Want to know what an aclinic line or natural bridge is? Discover some of the most common terms used in study of geography.
Much of the ice has melted, and the woolly mammoths are long gone. But could we still be in an ice age and headed for another? See more »
Like the members of an ill-fated rock group, the seven continents struck out on their own hundreds of millions of years ago. But what caused the breakup? And is a reunion tour in the works?
See more »Continents aren't the unchanging, universally recognized land masses of our school studies. But they do help us make sense of our world. How did they get their names?
See more »Much of the ice has melted, and the woolly mammoths are long gone. But could we still be in an ice age and headed for another?
See more »Some people like to honeymoon at Niagara Falls, while others go over the falls in a barrel. How do these geological formations come to be?
See more »Guyot, Arnold Henry (1807–1884), a Swiss-American geographer and geologist. Guyot wrote textbooks that helped popularize geology and geography in the United States.
See more »Aclinic Line, or Magnetic Equator, an imaginary, irregular line circling the earth near the geographical equator.
See more »Altitude, the height or elevation of a point or object above a given reference level.
See more »America, the lands of the Western Hemisphere, including the continents of North America and South America and nearby islands.
See more »Archipelago, a term applying to any sea containing clusters of islands, or to the island groups themselves.
See more »Badlands, an area of severe erosion, marked by deep ravines, sharp ridges, pinnacles, and other landforms carved by running water.
See more »Baedeker, a tourist guidebook prepared by a firm established by the German publisher Karl Baedeker (1801–1859).
See more »Bay, in geography, a part of a sea or lake in the form of an inlet, similar to a gulf but usually smaller.
See more »Bayou, a term used widely in the Gulf Coast states, especially Louisiana, for a swampy area.
See more »Bog, an expanse of wet, spongy ground composed largely of partially decayed or decaying plants.
See more »Canyon, a deep valley with steep sides. A narrow canyon with almost perpendicular sides is known as a gorge.
See more »City, a large or important town. Cities are the commercial, industrial, financial, political, and cultural centers of a nation.
See more »Coastal Plain, a strip of low-lying land along a seacoast, sloping gently toward the sea.
See more »Continent, the name applied to the largest divisions of land in the world. Although they form one landmass, Europe and Asia (often referred to as Eurasia) are counted as two continents.
See more »County, an administrative division of a country or state. In the United States it is the largest division within a state.
See more »Dalles, or Dells, rapids in a river where the water flows over slab-like rock in a narrow trough or gorge.
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