Asked by vitor zucco on Apr 27, 2024
Verified
What is the main reason why the age of oldest rocks can vary from one part of a continent to another?
A) older rocks are commonly remelted over huge regions
B) older rocks have been uplifted and eroded away
C) large parts of the continent are subducted deep within the mantle
D) parts of the continent have been added by the accretion of tectonic terranes
Tectonic Terranes
Distinct portions of the Earth's crust, often with a unique geological history, that have been attached to a tectonic plate through the process of accretion.
Accretion
The process of gradual growth or increase, particularly through the accumulation of additional layers or matter, especially in a cosmic or geological context.
Subducted
Refers to the geologic process where one tectonic plate moves under another and sinks into the mantle.
- Explain the role of hot spots in creating different landscapes and their importance in geology.
- Understand the techniques utilized for monitoring the movement of continents throughout geological eras.
Verified Answer
JB
Jaspreet bansalMay 03, 2024
Final Answer :
D
Explanation :
The main reason for the variation in the age of the oldest rocks from one part of a continent to another is due to the accretion of tectonic terranes. This process involves pieces of the Earth's crust (terrains) being added to a continent at convergent plate boundaries, leading to a mosaic of rocks of different ages across the continent.
Learning Objectives
- Explain the role of hot spots in creating different landscapes and their importance in geology.
- Understand the techniques utilized for monitoring the movement of continents throughout geological eras.