What is the chief moutain range in North America?

Question

Options: Caribbean sea, Eurpoe, Himalayas, North America, Indian Ocean, Australia, Amazon River, Mississippi River, Asia, Alps, Pacific Ocean, Rocky moutains, Appa/ Achain Moutains, Andes.

Answer 1

Rocky Mountains!
:-)

For more info, check out:
http://en.wikipedia.org/wiki/Rocky_Mountains

Answer 2

The Rocky Mountains

Answer 3

Wow... I can't believe u din't know this. It's the Rocky Mountains. Also, the other set of mountains is spelt Appalachain, not Appa / Achain.

Answer 4

The Rocky Mountains, often called the Rockies, are a broad mountain range in western North America. The Rocky Mountains stretch more than 3,000 miles (4,800 kilometers) from British Columbia, in Canada, to New Mexico, in the United States. The highest peak is Mount Elbert, in Colorado, which is 14,440 feet (4,401 meters) above sea level. Mount Robson in British Columbia, at 12,972 feet (3,954 meters) is the highest peak in the Canadian Rockies. The Rocky Mountain System is a United States physiographic region. They are not to be confused with the Coast Ranges located along the Pacific Ocean coast of North America.

In the United States, the more impressive rises above the Great Plains includes the Front Range from northern Colorado to northern New Mexico, in Wyoming along the Wind River Range and Big Horn Mountains, and in Montana with the Crazy Mountains and along the Rocky Mountain Front which extends into extreme southwestern Alberta, Canada. The Wasatch Range near Salt Lake City, Utah divides the Great Basin from the mountains in the west.The Rocky Mountains are commonly defined to stretch from the Liard River in British Columbia, down to the Rio Grande in New Mexico. The mountains can also be considered to run all the way to Alaska or Mexico, but usually those mountains are considered to be part of the entire American cordillera, rather than part of the Rockies.

The younger ranges of the Rocky Mountains uplifted during the late Cretaceous period (100 million-65 million years ago), although some portions of the southern mountains date from uplifts during the Precambrian (3,980 million-600 million years ago). The mountains' geology is a complex of igneous and metamorphic rock; younger sedimentary rock occurs along the margins of the southern Rocky Mountains, and volcanic rock from the Tertiary (65 million-1.8 million years ago) occurs in the San Juan Mountains and in other areas. Millennia of severe erosion in the Wyoming Basin transformed intermountain basins into a relatively flat terrain. The Tetons and other north-central ranges contain folded and faulted rocks of Paleozoic and Mesozoic age draped above cores of Proterozoic and Archean igneous and metamorphic rocks ranging in age from 1.2 billion (e.g., Tetons) to more than 3.3 billion years (Beartooth Mountains).[1] [2][3]

Periods of glaciation occurred from the Pleistocene Epoch (1.8 million-70,000 years ago) to the Holocene Epoch (fewer than 11,000 years ago). Recent episodes included the Bull Lake Glaciation that began about 150,000 years ago and the Pinedale Glaciation that probably remained at full glaciation until 15,000-20,000 years ago.[1][4] Ninety percent of Yellowstone National Park was covered by ice during the Pinedale Glaciation.[1][3]The "little ice age" was a period of glacial advance that lasted a few centuries from about 1550 to 1860. For example, the Agassiz and Jackson glaciers in Glacier National Park reached their most forward positions about 1860 during the little ice age.[1][5]

Water in its many forms sculpted the present Rocky Mountain landscape.[1][6] Runoff and snowmelt from the peaks feed Rocky Mountain rivers and lakes with the water supply for one-quarter of the United States. The rivers that flow from the Rocky Mountains eventually drain into three of the world's Oceans: the Atlantic Ocean, the Pacific Ocean, and the Arctic Ocean

Answer 5

if chief mean tallest or biggest its the rockies