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Part 1 1 CNR 27/11/10. 2 3 Sedimentation in sub- tropical latitudes 4 CNR 27/11/10.

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Presentation on theme: "Part 1 1 CNR 27/11/10. 2 3 Sedimentation in sub- tropical latitudes 4 CNR 27/11/10."— Presentation transcript:

1 Part 1 1 CNR 27/11/10

2 2

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4 Sedimentation in sub- tropical latitudes 4 CNR 27/11/10

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6 UK 6 CNR 27/11/10

7 This map shows that most of the area that is now the UK was covered by water in the Lower Cretaceous, although different sediments were deposited in different places. In the Upper Cretaceous sea- level rose again so that Chalk was deposited everywhere. clay sands 7 CNR 27/11/10

8 higher lower 8 CNR 27/11/10

9 Jurassic and Cretaceous periods MESOZOIC ERA PHANEROZOIC EON 9 CNR 27/11/10

10 10 CNR 27/11/10

11 The rocks exposed at the surface in Buckinghamshire range from the Quaternary glacial deposits (less than 2.6 million years old) to the Upper Lias (Jurassic 190 million years old) in the north of the county. However, this is only part of the story, below the surface much older rocks are present. The figure below shows a cross section through Buckinghamshire from north to south. The different rock layers are shaded by different colours. In order to display such a long distance, the section has been squeezed and the vertical scale exaggerated. The rocks dip to the South-East by 1 to 2 degrees. Chilterns WhitchurchSwanb Ayl s 11 CNR 27/11/10

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13  There are exceptions to this in both modern and fossil species, where the valves are asymmetrical.  E.g. Gryphea from the Jurassic, an ancient oyster. This is the fossil you are most likely to dig up in the garden, as they are common in the Oxford Clay. CNR 27/11/10 13 Gryphea – the “devil’s toe nail”

14 Ammonite suture lines septum 14 CNR 27/11/10

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20 20 CNR 27/11/10 The Ice Age

21 Part 2 21 CNR 27/11/10

22  Hand axe 22 CNR 27/11/10

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30 Blue Willow Pottery Blue Willow pottery was in common useage in the 1700s. It was first manufactured at Caughley Pottery Works by Thomas Turner. Blue Willow pieces quickly grew to become popular dishes for use in the home. Fragments are common in gardens around Swanbourne. 30 CNR 27/11/10

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