Shield volcanoes are NOT made of viscous (thick) lava; they are formed from highly fluid basaltic lava. Because the lava is thin and flows easily over long distances before cooling, it creates a mountain with a broad, gentle slope resembling ...
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The Indo-Gangetic Plain is a classic depositional plain formed by the accumulation of alluvium (silt, sand and clay) brought down by the Himalayan rivers like the Indus, Ganges and Brahmaputra. Over millions of years, these rivers filled a deep structural ...
The Appalachians are considered Relict (or Residual) Mountains because they are the eroded remains of a once-towering range. Originally formed over 250 million years ago, they were once as high as the Alps. Millions of years of wind, water and ...
The Drakensberg (meaning “Dragon Mountains”) is the highest mountain range in South Africa. It forms the eastern portion of the Great Escarpment, bordering the central plateau. It is famous for its dramatic basalt cliffs, deep valleys and the “Amphitheatre,” one ...
The Columbia Plateau (or Columbia River Basalt Group) was formed by massive fissure eruptions of basaltic lava. Between 6 and 17 million years ago, highly fluid lava flowed out of cracks in the earth and covered over 160,000 square kilometers. ...