Asked by Marie Paulicia G. Christoph on Apr 24, 2024
Verified
What is NOT true about how terraces form?
A) most terraces were once part of a floodplain
B) according to superposition, the lowest terrace is the oldest
C) terraces develop along a river that is incising eroding) downward
D) a river can have more than one level of terraces
Terraces
Flat or stepped surfaces carved into landscapes by natural processes like erosion or by human activities in agriculture or building.
Superposition
A principle stating that in an undisturbed sequence of sedimentary layers, each layer is younger than the one below it and older than the one above it.
Incising
Incising is the process by which a river or stream cuts down into its bed, deepening the channel through the erosion of sediment and rock.
- Understand the factors influencing river terraces formation, their identification, and chronological significance.
Verified Answer
DB
Devyani Bhatagra7 days ago
Final Answer :
B
Explanation :
The principle of superposition typically applies to sedimentary layers, where the oldest layers are at the bottom and the youngest at the top. However, in the context of river terraces, the oldest terraces are usually higher up, as they represent older floodplain surfaces left behind as a river cuts downward into its bed. Therefore, the statement that the lowest terrace is the oldest is incorrect.
Learning Objectives
- Understand the factors influencing river terraces formation, their identification, and chronological significance.