How Many Billion Years Old Are the World’s Oldest Mountains 

Discover the age of the world's oldest mountains and delve into their fascinating geological history. Explore the secrets hidden within these ancient formations.

The Makhonjwa Mountains, part of South Africa's Barberton Greenstone Belt, are Earth's oldest range, dating back about 3.5 billion years.

#1 Barberton Mountain

The Hamersley Range in Western Australia stands as the second oldest mountain range globally, with an age of approximately 3.4 billion years.

#2 Hamersley Range

Located in South Africa's Limpopo Province, the Waterberg Mountains are estimated to be around 2.8 billion years old.

#3 Waterberg Mountain

The Magaliesberg Mountains, situated in South Africa's North West Province, are estimated to be around 2.3 billion years. 

#4 Magaliesberg Mountain

The Guiana Highlands in northern South America, boasts some of Earth's oldest geological regions, dating back around 2 billion years.

#5 Guiana Highlands 

The Black Hills, situated in South Dakota and Wyoming, represent the oldest mountains in the USA, dating back approximately 1.8 billion years.

#6 Black Hill

Located in southeastern Missouri, the St. Francois Mountains are believed to be around 1.5 billion years old. 

#7 St. Francois Mountain


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