which mountains are older the Appalachian or the Rockies?

Answer 1

The Appalachian are older

Appalachian Mountains or Appalachians, great mountain system of eastern North America, nearly parallel with the Atlantic coast, and extending from the province of Québec in Canada to northern Alabama. The system is 2,400 km (1,500 mi) long and varies from 160 to more than 480 km (100 to more than 300 mi) in width. Its altitude varies between 460 and nearly 2,040 m (1,500 and nearly 6,700 ft). The three divisions of the system—northern, central, southern—vary considerably in geologic age, having been raised by a series of crustal plate collisions that began during the Ordovician period and climaxed in the Permian.

The birth of the Appalachian ranges, some 680 million years ago, marks the first of several mountain building plate collisions that culminated in the construction of the supercontinent Pangea with the Appalachians near the center. Because North America and Africa were connected, the Appalachians form part of the same mountain chain as the Atlas mountains in Morocco.


The younger ranges of the Rocky Mountains uplifted during the late Cretaceous period (140 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).

Answer 2

Appalachians. The Appalachian Mountains are older than the Rockies because they are not as high as the rocky mountains. Therefore, the Appalachians are older because they have had more time to erode.

Answer 3

The appalachians are much older than the rockies

Answer 4

Appalachians are older, the give away is the Appalachians have more rounded features, the product of more erosion.

Answer 5

You tell us