Fanhead trenching on an alluvial fan may indicate what?
Answer and explanation
Correct answer: A stream incising downward into the surface of the fan
Fanhead trenching occurs when a stream cuts a relatively deep channel into the upper or proximal part of an alluvial fan instead of spreading sediment evenly across its surface. This incision may reflect increased discharge, a change in sediment supply, tectonic uplift, or a fall in local base level. Option C identifies the defining process. The other choices describe unrelated marine, glacial, or cave phenomena and cannot explain a trenched alluvial fan.
Frequently asked questions
What is the correct answer to this question?
A stream incising downward into the surface of the fan
Why is this the correct answer?
Fanhead trenching occurs when a stream cuts a relatively deep channel into the upper or proximal part of an alluvial fan instead of spreading sediment evenly across its surface. This incision may reflect increased discharge, a change in sediment supply, tectonic uplift, or a fall in local base level. Option C identifies the defining process. The other choices describe unrelated marine, glacial, or cave phenomena and cannot explain a trenched alluvial fan.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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