A Peneplain is an old eroded Mountain. A example of a Peneplain is Ouachita Mountain range in OK. The are the oldest peneplain mountain range in US.
Old eroded mountains can be found in various regions around the world, but some notable ones include the Appalachian Mountains in eastern North America, the Black Forest in Germany, and the Scottish Highlands in the United Kingdom. These regions have experienced millions of years of weathering and erosion, resulting in their distinct landscapes characterized by rolling hills and worn peaks.
The Adirondack Mountains in upstate New York are considered to be some of the oldest mountains in North America. They are heavily eroded and characterized by their dome-like shape, which contrasts with the more rugged peaks of younger mountain ranges.
because they are very old and have been eroded by the elements
The Appalachian region in the eastern United States is known for its old eroded mountains, including the Blue Ridge Mountains and the Great Smoky Mountains. These mountains were formed hundreds of millions of years ago and have been gradually worn down by erosion.
The Appalachian Mtns are very, very old, highly eroded folded mountains.
The Appalachian Highlands are old, eroded mountains (the oldest in North America) ranging from eastern Canada to western Alabama
At the link below see some pictures. Notice that the mountains are not very tall. That is because they are old and have been eroded.
Old mountains are usually eroded down to their roots (e.g. the Scottish Highlands) while young mountains are usually high a pointy (e.g. the Himalayas). mountains that are jagged at the top are new mountains that are more rounded are old
The Appalachian Mountains, located in the eastern United States, are known for their old age and significant erosion. This mountain range stretches from Georgia to Maine and is renowned for its rounded peaks and lush greenery.
Old mountains are characterized by their rounded peaks and lower elevations due to erosion processes over millions of years. They tend to have a more subdued appearance compared to new mountains, which have sharp, rugged peaks and higher elevations resulting from tectonic forces that are still actively shaping the landscape. Additionally, old mountains often have gentler slopes and more developed ecosystems, while new mountains may have more unstable geological features and younger, less diverse habitats.
Peneplain is an eroded mountain.
They are roots of extremely old mountains that had eroded significantly before being covered with repeated layers of sedimentation from a now extinct inland sea.