Question

Which among the following Mountains were formed during tertiary period?
Alpine Mountains
Pre-Cambrian mountains
Caledonian Mountains
All of the above​

Answer 1

The correct answer will be Alpine Mountains.

Now, the Tertiary period refers to the first part of the Cenozoic Era, the other part being the Quaternary period. The Tertiary period occurred approximately 66 million to 2.6 million years ago. Now let us look at the time or origin of each of the given mountains:-

• Alpine Mountains - 65 million to 7 million years ago
• Pre-Cambrian Mountains - more than 4 billion years ago
• Caledonian Mountains - 430 million to 380 million years ago

From the above three alternatives, only the age of the Alpine Mountains coincide with that of the Tertiary Period.

Ans) Alpine Mountains

Answer 2

ALPINE MOUNTAINS were formed during the tertiary period. (OPTION A)

TERTIARY PERIOD -

• Tertiary started 65 million years ago with the end of the dinosaurs from the earth's surface.
• It lasts till the ice age of the quaternary period starts approximately 2.6 million years ago.
• The period is divided into five epochs: Paleocene, Eocene, Oligocene, Miocene, Pliocene.
• The alpine mountains formed during the tertiary period by the collision of African and European tectonic plates.
• By the collision of the tectonic plates, Tethys Ocean disappeared giving rise to alpine ranges.
• The Alps forms Alpine belts along the margins of Asia and Europe.