They are a barrier to travel and settle ment because of the snow and there peaks
rocky mountains
Rocky mountains
Rocky Mountains
because of earthquakes.
Lewis and Clark had to cross the Rocky Mountains to reach the Pacific Ocean. This rugged and challenging terrain presented a significant geographical barrier for their expedition.
Rocky mountains
The Rocky Mountains.
The Appalachian Mountains provided a natural barrier to the western expansion of the English Colonies in America, or so some thought.
buffalo
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The Lewis and Clark Corps of Discovery traveled over the Rocky Mountains and the Bitterroot Range during their expedition in the early 19th century. These mountain ranges presented significant challenges for the explorers as they journeyed westward.
probably