Road tyres that can cope with shards of flint?

[Herman Toothrot]

I live in the Chilterns and like to ride the lanes in the hills, this means lots of flint chippings on the roads, last 4 road rides in a row i've punctured. Each time checking tyre its been shards of flint wedged into the casing. Continental ultra sport lasted no time at all and now a Vittoria open Corsa CX has a 4mm cut in the centre of the tread after less than 80km use. I have nice wide rims that make the 23mm corsa measure up at 25mm, so 700c 23 size is good, can anyone recommend a more durable tyre that cope with sharp stuff better? Never had a pinch puncture or a thorn puncture, but the flint punctures are now feeling quite disruptive.

[Herman Toothrot]

Will take a look at GP4000's, heard so many bad things about gatorskins. Cheers for the advise, I was hoping with the high tpi count of the Corsa's they'd be more durable than they now appear to be.

[Herman Toothrot]

I run ghetto tubeless on my mountain bikes, was thinking about sticking some Stans fluid into my inner tubes.