GEOL1030 Study Questions: Erosion - Part I

Instructions: Answer the ten following questions by choosing the BEST one of the available answers. An answer key will become available at a later time.


1. Which of the following DOES NOT FIT -- Aggradation and:    (a) isostatic uplift (b) deposition (c) weathering (d) volcanism

2. One of the main reasons that mountainous landscapes erode faster than the sedimentary platforms is the difference in: (a) climate (b) bedrock geology (c) sun exposure (d) slope

3. The Hudson Bay region in Canada is currently rising due to isostatic rebound. (The melting of the glaciers at the end of the last "Ice Age" reduced the load on the crust, and it is still adjusting to this. If you require further information, read the sections on isostasy and isostatic adjustment in the textbook chapter entitled "Mountain building".) As a result, the rivers there should be _______ their channels. Let's suppose for a moment that crustal rebound is not occurring; instead, sea level is falling. In response, the rivers around Hudson Bay would be ________ their channels.
(a) degrading; agrading (b) agrading; degrading (c) agrading; aggrading (d) degrading; degrading

4. When a sedimentary basin subsides due to sediment loading, this is an example of ________ adjustment; the uplift of the Himalayas is an example of ________ uplift.  (a) isostatic; tectonic (b) tectonic; tectonic (c) tectonic; isostatic (d) isostatic; isostatic

5. In a desert landscape, ____ processes produce _____; however, ______ action is still the most effective agent of erosion.
(a) eolian, desert pavements; fluvial (b) fluvial, valleys; eolian (c) stream, desert pavements; wind (d) wind, dunes; frost

6. True or False: Both in the desert and at the coast, wind is subordinate to water as an erosional agent.

7. True or False: Wind, water, and ice* all may play a role in the development of a desert pavement. (* give this some real thought before answering!)

8. True or False: Lack of soil contributes both to the formation of a desert pavement and to the development of a desert hillslope's concave profile.

9. In a sense, _____ is responsible for the abundant food in America's so-called "bread basket" as well as decreased food production -- and the resulting human suffering -- in areas of northern Africa.   (a) glaciation (b) fluvial erosion (c) desertification (d) climate change

10. A beach is a(n) ________; a naturally occurring rock outcrop is a(n) ________; a gravel lag deposit is a _________.
(a) depositional landform; weathering-limited, erosional landform; depositional landform.
(b) weathering-limited, erosional landform; depositional landform; transport-limited, erosional landform.
(c) weathering-limited, erosional landform; depositional landform; depositional landform.
(d) depositional landform; weathering-limited, erosional landform; transport-limited, erosional landform
(e) depositional; transport-limited, erosional landform; depositional landform