Q. Which of the following statements with regard to the Guiana Highlands is/are correct?
1.Located in northeastern South America, these highlands form part of the Guiana Shield, which represents one of the oldest stable land surfaces on Earth.
2.Geologically, the formation consists of young Phanerozoic volcanic structures that emerged during the separation of Africa and South America.
Select the correct answer using the code given below:
Answer: A
Notes:
Detailed Explanation:
- Statement 1 is correct: The Guiana Highlands are an ancient landscape located between the Amazon and Orinoco rivers. They are part of the Guiana Shield, an ancient craton that has remained stable for hundreds of millions of years.
- Statement 2 is incorrect: The shield is not made of young Phanerozoic volcanoes. It is an ancient Precambrian geological formation dating back roughly 1.7 billion years, consisting primarily of highly resistant quartzites, sandstones, and crystalline basement rock that form dramatic flat-topped mountains called tepuis.
