3. Does it appear that \"Laguna Madre\" (between Padre Island and the mainland)

Question

3. Does it appear that "Laguna Madre" (between Padre Island and the mainland) is (a) filling with sediment? What is the evidence of this? What are the likely sources of this sediment? (b) (c) EXERCISE 49 PROBLEMS-PART III-GOOGLE EARTHTM Toanswer the following questions, go to the Hess Physical Geography Laboratory Manual, 12th edi- tion, website at www.MasteringGeography.com, then Exercise 49 and select "Exercise 49 Part III Google EarthTM" to open a KMZ file in Google Earth, or scan the QR code for this exercise and view "Exercise 49 Part III Google EarthTM video." . (a) Fly to Point 1. What kind of depositional coastal landform is shown here? (b) How does this kind of landform develop? 2. Fly to Point 2. What kind of depositional coastal landform is shown here? 3. (a) Fly to Point 3. What kind of depositional coastal landform is shown here? What is the dominant direction of the longshore current along the shore in this bay-clockwise or counterclockwise? (b) (c) How do you know? 4. Fly to Point 4. What kind of erosional coastal landform is shown here? 350

Explanation / Answer

exercise 49

1.a)the coastal landform developed here is an Estuary bounded by barrier beach or island forming parallel to the coast line seperating the estuary from the ocean.

b)During rising sea level the water filled the already formed river valleys, glacial troughs forming estuary.Once formed the estuaries are influence by both river deposition as well as by marine influence during tides.The barrier bars are formed when the waves stirred the sea sea floor strikes the land it breakes and looses energy and deposit barrier bars.

2)The coastal landform shown is a lagoon.

3)a)The point 3 is a barrier bar sttached to a sand spit

b)The dominant direction of the longshore current is clockwise

c) The shape of the spit is landward due to clockwise direction of the longshore current.

4)The point for shows a Headland and bay landform formed due to the erosional activity of the ocean

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