“…In New World contexts, geomorphologists have coined the term post European settlement alluvium, or PESA (Portenga et al, 2016), and in Europe ‘anthropogenic alluvium’ (Macklin et al, 2014) to refer to stratified deposits of soil produced by recent erosion in the headwaters of river systems. PESA is generally assumed to be associated with increased erosion due to land clearance and agricultural activities, but in some parts of the world, PESA deposits have been explicitly associated with mine waste, including the western United States (Alpers et al, 2005; James, 2004, 2013; Rohe, 1983), Bolivia (Miller et al, 2004), New Zealand (Clement et al, 2017), Slovakia (Bitušík et al, 2018) and the UK (Dennis et al, 2009; Foulds et al, 2013, 2014; Kincey et al, 2022; Lewin & Macklin, 1987; Thorndycraft et al, 2003). The quantity and extent of mining‐related PESA deposits, however, and the human origins of processes that have led to its production, have generally been poorly understood.…”