Yes, I'll accept that as near enough. Over to you, sn...
Big Country lacks formations and has slippery muddy sediment banks at its bottom end, though still interesting as it is a huge fossil passage coming from apparently nowhere and ending up at a massive choke where its stream sinks, I do believe never to be seen again inside the cave (unless you know better).
These formations are in extensive side passages called Blorenge Oxbows which begin on the left about 60m down from the point where you first met the huge passages of Big Country, assuming you didn't get in there via Slaughter Crawl in which case it is 130m on the left. Giant size cave survey on the stairs wall at Whitewalls if you've not seen one.