answersLogoWhite

0

The Sierra Nevada mountain range is approximately 400 million years old, with its formation beginning during the late Paleozoic era. The range as we know it today was shaped significantly during the Sierra Nevada orogeny, which occurred around 20 to 30 million years ago. Geological processes, including volcanic activity and tectonic movements, have contributed to its current landscape over millions of years.

User Avatar

AnswerBot

1h ago

What else can I help you with?