CALCH Day 4 – Table, Tumble and Fall


The start of Thursday 14th March marked the beginning of the 4th day of fieldwork on the Black Mountain. Menna and Sarah from DAT were joined by three volunteers – Tony, Joe and Brian – all of whom were wrapped up and raring to get on with more archaeological investigations on site.

The Tic Tac Two - Sarah and Tony wrapped up against the elements

The Tic Tac Two – Sarah and Tony wrapped up against the elements

The plan was to continue the plane table surveying that was successfully started on Day 3. The weather was again bright and less windy which bode well for carrying on the good work! All that could be recorded from Wedsnesday’s survey point had been, therefore it was necessary to move the survey equipment to a different location. Due to the difficulties encountered when using plane table survey equipment when it’s set up on a concrete base it was decided that it would make sense to move the survey point to location that wasn’t floored in concrete. Whilst this would make the plane table station more stable and harder to accidentally kick out of place, it meant that the new survey point would have to be linked in with yesterday’s; easier said than done, it seems!

Difficulties ensued, and I’m not entirely sure that I understand exactly what had to be done in order to callibrate the new survey point with the old one… But according to Menna in involves measurements, alignment with fixed points and a certain amount of moving the table ‘a little bit to the left, no, right again, no, this way’.

Joe, Brian and Tony taking measurements

Joe, Brian and Tony taking measurements

Tony and Brian holding up ranging rods so that an accurate measurement can be read

Tony and Brian holding up ranging rods so that an accurate measurement can be read

The plan was to continue the plane table surveying that was successfully started on Day 3. The weather was again bright and less windy which bode well for carrying on the good work! All that could be recorded from Wedsnesday’s survey point had been, therefore it was necessary to move the survey equipment to a different location. Due to the difficulties encountered when using plane table survey equipment when it’s set up on a concrete base it was decided that it would make sense to move the survey point to location that wasn’t floored in concrete. Whilst this would make the plane table station more stable and harder to accidentally kick out of place, it meant that the new survey point would have to be linked in with yesterday’s; easier said than done, it seems!

Difficulties ensued, and I’m not entirely sure that I understand exactly what had to be done in order to callibrate the new survey point with the old one… But according to Menna in involves measurements, alignment with fixed points and a certain amount of moving the table ‘a little bit to the left, no, right again, no, this way’.

Newly collapsed part of a kiln

Newly collapsed part of a kiln

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