Yep, you definitely don't want to be building on uniformly graded soils, especially not unconsolidated fine-grained soils. Which is pretty much why we got "res

Yep, you definitely don't want to be building on uniformly graded soils, especially not unconsolidated fine-grained soils. Which is pretty much why we got "residential red zones"[1] in Kaiapoi and Christchurch in the 2010 Greendale earthquake and subsequent aftershocks - suburban areas built on large unconsolidated deposits of fine alluvial silts left by the Waimakariri River in its long wanderings across the Canterbury Plains[2] suffered massive liquefaction, repeatedly. IIRC liquefaction has even been observed in uniform gravels. [1]https://www.linz.govt.nz/crown-property/types-crown-property/christchurch-residential-red-zone/residential-red-zone-areas https://www.linz.govt.nz/crown-property/types-crown-property... [2]https://www.ecan.govt.nz/get-involved/news-and-events/zone-news/waimakariri/shifting-role-of-the-waimakariri-river/ https://www.ecan.govt.nz/get-involved/news-and-events/zone-n...