Facsimile Borehole Core: Burnside
One cylindrical facsimile core showing geological layers based on a borehole made in Burnside, Christchurch; created for the Canterbury Quakes exhibition, February-October 2012 and subsequent tour.
This simulated borehole core demonstrates the ground conditions in western parts of Christchurch and helps to explain why liquefaction was not consistent throughout Canterbury. This example, depicting the ground conditions of Burnside in the west of Christchurch, shows thick gravel deposits that are generally too coarse for liquefaction. After the earthquakes Burnside was not affected by liquefaction because the ground is more stable than in the eastern suburbs. Liquefaction is also influenced by how deep the groundwater table is below the surface. This borehole core shows that the groundwater table in Burnside is 5m below the surface, which contributes to the stability of the ground.