Torlesse greywacke comprises about 19% of New Zealand’s rock mass at/near the surface. Wellington is New Zealand’s capital city and is underlain predominantly by closely jointed greywacke. Here we will provide insights into the role of geomechanical characterisation of greywacke rock masses on dynamic slope-stability analysis.

Christopher I Massey, GNS Science, Lower Hutt, New Zealand and Marc-Andre Brideau, BGC Engineering, Calgary, AB, Canada