Meaning of shin-cracker in English:

shin-cracker

noun

mass noun informal Australian
  • (in opal mining) very hard, brittle rock that splinters easily.

    • ‘in a hole of that depth you would first sink through about 10 or 12 feet of shin-cracker’
    • ‘Her face was the colour of shin-cracker.’
    • ‘The biggest problem was the first three feet of shin-cracker.’
    • ‘Hardened claystone, similar to the shin-cracker of Lightning Ridge, has inhibited exploitation of the area.’
    • ‘Black opal is found in the sandstone and dirt underlying the shin-cracker.’
    • ‘Beneath the weathered quartzite or shin cracker were layers of soft, porous sandstone.’