Group,Code,Colour,Matrix,Fine inclusions,Coarse inclusions,Moulding sand,Comments,Date of use
Sandy; local?,A (Ch),"orange, red",,Moderate med-coarse quartz sand R,Common - occasional chalky cream grits 1-10mm R,,Very few examples with chalk grits  -  seems to be a variant of the sandy group as in other respects similar to B/C/D,Roman
Sandy; local?,B,red,hard well mixed clay matrix,quartz sand,"dark red haematite/ironstone grits 1-8mm, sometimes v rounded pellets, some flat angular",,,Roman
Sandy; local?,C,"orange, red",hard well mixed clay matrix,Moderate med-coarse quartz sand R; density & size of sand variable; also low density of haematite/ironstone generally <3mm,,,,Roman
Sandy; local?,D,"orange, red",Fine clay,sparse quartz sand,none,,,Roman
Sandy; local?,E,"orange, red; cream laminations (sometimes pale grey within a grey core) varying between quite thin and undulating  to thicker and occasionally more swirling.",fine sandy sometimes micaceous clay,"frequent quartz sand, mostly c 0.3-0.6mm, but some both larger and smaller & occasional quartz/quartzite grits 2-5mm",red-maroon ferruginous clay pellets/fe ox/haematite/ironstone grits 1-8mm; flint grits up to 20mm A,,,Roman
,F,,,,,,,
Sandy; local?,G,orange,v fine sandy/silty smooth clay matrix,moderate - freq coarse qtz sand 1-2mm,qtz & ironstone grit 2-4mm,coarse qts & ironstone sand and grit same as inclusions,,
Harrold/Beds; shelly,Sh,"brown, buff; grey core",clay,shell,"High density shell grit mostly 0.5-4mm, but usually a scatter of larger fragments up to 8mm",,,Roman: M-LR