XI. Nearshore Zone and Continental Shelf (15 Points).

2. Briefly explain the differences between estuaries and lagoons. (5 pts.)

II. Nearshore Zone and Continental Shelf (60 Points). Answer and do the following:

A. Briefly explain the reasons that the modern nearshore zone and continental shelf are considered to be in "disequilibrium" and evidence that these areas are trending toward "equilibrium." Use sketches if you wish. (15 pts.)

B. Indicate whether the deltas shown below are river-, wave-, or tide- dominated. Briefly explain the reasons for your answers. (15 pts.)

C. Briefly explain the differences between estuaries and lagoons. (10 pts.)

II. Nearshore Zone & Continental Shelf (60 Points). Answer & do the following:

A. Draw cross-sections of type A & type B estuaries & indicate where the most

rapid sedimentation will occur. (10 pts.)

(5 pts.) C. Draw a cross-section of a type B estuary and indicate where the most rapid sedimentation will occur.

C. Draw a cross-section of a type A estuary and indicate where the most rapid sedimentation will occur. (5 pts.)

B. Briefly describe how irregular shorelines become straightened. Use sketches if you wish. (10 pts.)

(5 pts.) B. Draw a topographic cross-section of a beach and label its morphologic features.

C. Discuss the relationship between tidal range & coastal morphology. Give examples of coasts from different parts of the world that illustrate particular kinds of coastal morphology. In particular, discuss the nature of Georgia's coastal morphology. Use sketches if you wish. (20 pts.)

D. Do the following based on the diagram below: (20 pts.)

1. Give two explanations for the origin of the sand ridge at "A" in the hypothetical cross-section across a continental shelf shown below. Indicate when the sand body would consist of relict sediment & when it would consist of palimpsest sediments. Use sketches if you wish. (10 pts.)

2. Explain the reasons that the sand at "B" occurs as a ridge, with lagoonal mud in the troughs, while the sand at "C" is blanket-like. (10 pts.)

VI. Coastal Zone and Continental Shelf (30 Points).

A. Answer and do the following based on the hypothetical cross-section across a continental shelf shown below (20 pts.).

1. Briefly explain why mud at "A" gives way to sand at "B" (10 pts).

2. Give a probable explanation for the origin of the sand ridges at "C" and "D". Use diagrams if you wish. You may need to refer to papers cited in the book to completely answer this question (10 pts).

1. Give two explanations for the origin of the sand ridges at "A" and "B". Use diagrams if you wish. Indicate which sand body consists of relict sediment and which consists of palimpsest sediments. (15 pts)

IV. Coastal Zone and Continental Shelf (35 Points).

A. Give two explanations for the origin of sand ridges on the continental shelf in terms of barrier island evolution and modern shelf processes. Use diagrams if you wish. Indicate whether the sand in the ridges is relict or palimpsest for each explanation. (20 pts.)

IV. Coastal Zone and Continental Shelf (5 Points). Briefly discuss the difference between relict sediment and palimpsest sediment, as used to describe continental shelf sediments, giving specific examples and using sketches if you wish.