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Twisting the auger required a lot of force as the ground was hard in the summer.  The auger is shaped rather like a giant corkscrew.

Rounded Rectangular Callout: Touch a picture for details.
We screwed an auger into the ground to take samples of soil at different positions in the ditch.  We were looking for peaty remains which might have been at the bottom where it had once been full of water.

Cores 1 & 2 were taken inside the ditch.  Core 3 was taken in the higher platform which is surrounded by two sides of the ditch.

Samples from the cores showed deposits of organic materials at the bottom of the ditch near the western corner. This and the deeper layers of silt in the ditch compared with those of the higher platform may support the idea of a moated enclosure.
Links to more details
Documentary evidence Plane table surveying
Place name analysis Resistivity surveying
Soil sampling Community links
Metal detecting Acknowledgements
Aerial photography analysis Dowsing and pond dipping
Geology Courses and visits