mention four important characteristics of the Appalachian high land of USA
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Along with the Rockies, the Appalachian Mountains -- home to the Appalachian Trail -- are the most famous mountain range in the country; they extend for 1,500 miles from northeastern Alabama to the Canadian border. However, unlike the Rockies, the continent's oldest mountain range is gentler, without significant peaks or heights: The bases of the Rockies' High Plains are either as high or higher than the majority of the summits of the Appalachians. Along with their lower mountain range, the Appalachian Mountains are composed of a range of sloping ridges, crests, valleys and forests.
Answer:
Along with their lower mountain range, the Appalachian Mountains are composed of a range of sloping ridges, crests, valleys and forests.
The Appalachian Mountains, often called the Appalachians, are a system of mountainsin eastern North America. The Appalachians first formed roughly 480 million years ago during the Ordovician Period. They once reached elevations similar to those of the Alps and the Rocky Mountains before experiencing natural erosion.The Appalachian chain is a barrier to east–west travel, as it forms a series of alternating ridgelines and valleys oriented in opposition to most highways and railroads running east–west.
Definitions vary on the precise boundaries of the Appalachians. The United States Geological Survey (USGS) defines the Appalachian Highlands physiographic divisionas consisting of thirteen provinces: the Atlantic Coast Uplands, Eastern Newfoundland Atlantic, Maritime Acadian Highlands, Maritime Plain, Notre Dame and Mégantic Mountains, Western Newfoundland Mountains, Piedmont, Blue Ridge, Valley and Ridge, Saint Lawrence Valley, Appalachian Plateaus, New England province, and the Adirondack areas. A common variant definition does not include the Adirondack Mountains, which geologically belong to the Grenville Orogeny and have a different geological history from the rest of the Appalachians.