<p> Field Trip to Dungy Head and St. Oswald’s Bay</p><p>Name ______</p><p>1. Scroll down to the Table of Contents and read the introduction (DH-1) to the area around Dungy Head and St. Oswald's Bay. Then go to DH-6, click on the geologic column showing the strata of the Lulworth Region and answer the following questions: A. What is the thickness of the Upper Cretaceous chalk with black flint?</p><p>B. What evidence is there for organic matter in the Wealdon Group marls?</p><p>C. What fossils are found in the Kimmeridge Clay?</p><p>2. Now go to DH-19, read the text beneath the two figures and then click on the first geological cross-section diagram of Lulworth Cove and answer the following questions: A. What kind of anticline is illustrated in this section?</p><p>B. What is the feature called that underlies the Chalk, Greensand and Gault? (Hint: look at </p><p> the first figure in DH-6)</p><p>C. Scroll down to DH-19a and read the text beneath the figure. What is an inversion </p><p> structure?</p><p>3. Dungy Head (DH-11) is a good location to see what strata? How thick is it?</p><p>4. What mineral that is also found on Mars is precipitating from the spring at St. Oswald’s Bay (DH-16a)?</p><p>5. At DH-17 find a description of the Gault Clay at St. Oswald's Bay and answer the following questions: A. Is it a marine or nonmarine deposit? On what evidence is your answer based?</p><p>B. Why is it called the "Blue Slipper" in the Isle of Wight?</p><p>C. Three kinds of clay minerals occur in the Gault, one of which is expandable. Which one </p><p> is it?</p><p>D. Is the upper contact with the greensand abrupt or transitional?</p><p>6. At DH-22 how can you test the direction of movement on the faults in the Upper Chalk? 7. At St. Oswald's Bay (DH-24) there are some striking examples of dolines. What are these features and how did they form? </p><p>8. At DH-27 the Lower Chalk at Man O'War Head consists of cyclical, alternating beds. What is the probable explanation for the origin of these cycles? A conspicuous marker bed in the chalk has a characteristic index fossil. What is it?</p><p>Well, that's enough for today. Besides, it is starting to rain and I notice a few of you forgot to bring rain gear (tsk, tsk).</p>