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It varies. In Canada, most geologists consider "The Rockies" to be the sedimentary mountain belt between the Columbia Valley and the Plains, extending north/south from Montana to almost the 60th parallel (some debate there). These rocks originated as sediments in a shallow sea which existed for a very long time, from the Precambrian until roughly 200-250 million years ago. Compressional forces from the Pacific began building the mountains not long after. Mountain building, or "orogeny", is believed to have happened in phases, mostly during the Mesozoic (the age of the dinosaurs). So if your question is "how long have the mountains existed as they are today" it would be roughly 100-200 million years. If your question is "how old are the actual rocks" it would be more like 200-600 million years. So really... Rocks are - 200-600 million years old Mountains existed - 100-200 million years
It varies. In Canada, most geologists consider "The Rockies" to be the sedimentary mountain belt between the Columbia Valley and the Plains, extending north/south from Montana to almost the 60th parallel (some debate there). These rocks originated as sediments in a shallow sea which existed for a very long time, from the Precambrian until roughly 200-250 million years ago. Compressional forces from the Pacific began building the mountains not long after. Mountain building, or "orogeny", is believed to have happened in phases, mostly during the Mesozoic (the age of the dinosaurs). So if your question is "how long have the mountains existed as they are today" it would be roughly 100-200 million years. If your question is "how old are the actual rocks" it would be more like 200-600 million years. If that answer seems vague... that's geology for you!
What else can I help you with?
How Rocky Mountains similar to Appalachian mountains?
Both the Rocky mountains and the Appalachian mountains are in the United States of America! The Rocky mountains are more rigid and ROCKY, and the Appalachian mountains are old and rounded. I have recently studied these ranges, and I hope that this helps you! :)
How are the Appalachian Mountains similar and different from the Rocky Mountains?
The Rocky Mountains are taller than Appalachian Mountains and has sharp pointy peaks. The Rocky Mountains are taller.They Both have eroded. The Appalachian Mountains are older and shorter than rocky mountains.
What is a sentence for Rocky mountains?
The Rocky Mountains are in Canada.We will climb the rocky mountains this week.
Who has more mountains the rocky mountains or the Appalachian mountains?
the rocky mountains are higher because the rocky are 14,400 and the appalachian is 3,000
What mountain range extends from New Mexico to Alaska?
The Rocky Mountains
Are the Rocky Mountains volcanic?
no the rocky mountains are not volcanic.
What are landslides of the Rocky Mountains?
what are the landslides of the Rocky Mountains
The Rocky Mountains stretch from to?
the rocky mountains stretch from
How are Rocky mountains different from Appalachian mountains?
The Rocky Mountains are taller than Appalachian Mountains and has sharp pointy peaks. The Rocky Mountains are taller.They Both have eroded. The Appalachian Mountains are older and shorter than rocky mountains.
How do you use rocky mountains in a sentence?
There are some very rocky mountains in the west of Ireland. The Rocky Mountains are a range of mountains in the west of the USA.
What is the origin of the rocky mountains?
The Rocky Mountain Horse comes from the Rocky Mountains in the USA.
Which are higher in altitude the Rocky Mountains or the Appalachians?
rocky mountains
