Another possibility is the importation of quarried soils.
Both the text and the extensive bibliography of primary sources will doubtless be quarried gratefully by other local and national historians.
The cool, grey limestone and the warm-hued gritstone which form the traditional building materials are still being quarried.
Only fissures 12 (not shown), 11, 13, 14, 15 and 16 (circled) in the top quarried level are still present.
Following the discovery of palynomorphs in fissure 2, further samples were routinely and regularly collected from all the fissures as they were quarried.
The fissures 12, 13 and 16 that occur on the top quarried level were probably infilled by sediments in brackish water conditions.
Most gold diggers quarried gold ore with little knowledge of the condition of the soil they worked.
Compared to the map of the quarry (a) there is now a fourth quarried level.
