“…If not stated in the publication, the following parameters were used to facilitate comparison: conversion factors -Adamiec and Aitken (1998), no Rb calculation from K, grain size attenuation for Ḋ α and Ḋ β - Bell (1980) and Mejdahl (1979) respectively, etch depth -9 μm, etch depth attenuation - Bell, 1979, a-value either 0.086 ± 0.0043, 0.035 ± 0.001 (Rees-Jones and Tite, 1997) or 0.15 ± 0.015 (Balescu and Lamothe, 1994) dependent on mineral and grain-size, overburden density -2.0 ± 0.1 g.cm −3 , latitude, longitude and altitude estimated from Google Earth. The studies used for the DRAC comparison: Alappat et al, 2011, Bates et al, 2003, Breman et al, 2003and Clark-Balzan et al, 2012, Davidovich et al, 2012,Demeter et al, 2012, Haberzettl et al, 2009, Halfen et al, 2010, Hall et al, 2010, Houben et al, 2013, Kaiser et al, 2009, Kars et al, 2012, Kels et al, 2014, Klasen et al, 2011, Kock et al, 2009, Le Dortz et al, 2009,Lepper et al, 2013, Lomax et al, 2014, Madsen et al, 2009, Roskosch et al, 2012, Schatz et al, 2012, Schmidt et al, 2014,Schokker et al, 2005and Stevens et al, 2011Tamura et al, 2011, Thiel et al, 2011, Xu et al, 2010and Yang et al, 2010…”