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Excavation

Photograph of an archaeologist at work on an earth surface dotted with post holes and small pits Magnifing glass image

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Excavating a sunken-featured building

Archaeological excavations in London can be very different from some of the digs you might have seen on TV. If some London excavations look like they are happening on a building site, that's probably because they are. All archaeology in the city takes place as a result of development. Often the archaeologists are working on site as building work happens around them, over them and sometimes even underneath them!

 
Photograph of a crouched archaeologist with his hand out showing a number of gold coins Magnifing glass image

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Striking gold!

Techniques

Excavation techniques include everything from using a mechanical digger to remove modern foundations and rubble to painstaking excavation work with a brush and trowel to uncover delicate features or finds.

What do archaeologists look for?

Excavation isn't just about finding artefacts. Most archaeology involves identifying different layers in the soil which represent past events or structures, for example where ancient walls and floors have been, or a pit that has been filled in over time. This evidence is as important as coins or pottery in working out what a site was and how people used it in the past. Archaeologists also analyse soil samples for environmental evidence such as tiny animal bones and pollen which can tell them about the landscape and climate in the past, or for the remains of fruits and seeds which provide evidence of people's diet and the economy.

What's happening on site?
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Why are you down a well?
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Photograph of two archaeologists at work on a large site filled with low walls, trenches and raised levels. Over it all is a covered walkway, and the Guildhall towers above the site in the background.

Find out about site strategy

Photograph of an excavation site containing a standing pillar and several stone structures. Neighbouring buildings stand high above each side of the site, and the dome of St Paul's Cathedral is in the background.

Find out about stratigraphy

Photograph of an archaeologist making a detailed drawing of a wall

Find out about records