What puncture proof MTB tyre for mud, clay, chalk and flint?

[mikeveal]

As per the title really.
Was out for a lunchtime ride yesterday. It was the second ride on a Nobby Nic (performance, folding, 26"*2.25"). The tyre split part on the side wall, part on the tread. It's clearly light weight rubbish and isn't fit for purpose. It's failed catastrophically in less than 15 miles.

So what should I buy that isn't going to fall apart (for mud, clay chalk and sadly flint)?

TIA.

[mikeveal]

Thanks to one and all.

So Maxxis Exo casing or Chunky Monkey from OnOne.

I'd been looking at the Maxxis High Roller, so I was part way there.

I work near the Ridgeway in Berkshire and I've bought a cheap second hand bike just to get out in my lunch hour and explore the byways. That and because I need to do something healthy now I can no longer deny being middle aged! It's flint, chalk and clay.

So far, I have two punctures in a dozen rides. The first was on the old knackered tyre that came with the bike, so I just threw it away and bought the Nobby Nic. When I unboxed it I wasn't impressed with how flimsy the sidewalls were, ~15 miles later the tyres a write off. You can draw your own conclusions, but I'll never buy Schwalbe again.