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Field Survey
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The term ‘field survey’ is used to describe all work that does not disturb archaeological deposits below the ground through an excavation. Field survey techniques involve recording measurements that help archaeologists draw plans or diagrams of archaeological features. There are a variety of different field survey techniques, including geophysical survey, building recording survey, field walking survey, landscape survey and earthwork survey.
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Cropmark
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Cropmarks appear as light and dark marks in growing and ripening crops. These marks relate to differences in the soil below. For example, parched lines of grass may indicate stone walls. Crops that grow over stone features often ripen more quickly and are shorter than the surrounding crop. This is because there is less moisture in the soil where the wall lies.
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Aerial Photograph
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Aerial photographs are taken during an aerial survey, which involves looking at the ground from above. It is usually easier to see cropmarks and earthworks when they are viewed from above. Aerial photographs help archaeologists to record what they see and to identify new sites. There are two kinds of aerial photographs; oblique and vertical.
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Iron Age
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About 800 BC to 43 AD
The Iron Age comes after the Bronze Age and before the Roman period. It is a time when people developed the skills and knowledge to work and use iron, hence the name ‘Iron Age’ which is given to this period. Iron is a much tougher and more durable metal than bronze but it also requires more skill to make objects from it. People continued to use bronze during this period.
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OVAL ENCLOSURE *
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An oval shaped area of land enclosed by a boundary ditch, bank, wall, palisade or similar barrier.
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ENCLOSURE *
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An area of land enclosed by a boundary ditch, bank, wall, palisade or other similar barrier. Use specific type where known.
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* Copyright of English Heritage (1999)
