IlikePie1

I've got these three points all showing .37% Cassiterite in them and have an ultra high concentration. Does that mean that this area should have a cassiterite node or does the low percent mean the node if there is one is extremely small?

I have my pit kilns under this layer of sand surrounded by more sand. Yet they go out all the time. I've fully covered the top in the hope they won't but still for no reason I can see they go out and I can't fire my clay.