Siltstone, light brown grey, 20% argillaceous, 10-40% fine to medium sand grains, trace micromicaceous, trace lithic grains (jaspilite), firm, laminated.Sandstone, clear to light grey, fine to coarse grained, predominantly medium, moderately sorted, subangular to subrounded, 0-30% argillaceous, trace dolomitic cement, trace pyrite aggregates, unconsolidated to friable, poor to fair visible porosity. Claystone, medium grey to yellow brown, sandy, trace-20% dolomite, trace pyrite aggregates, trace micro- micaceous, soft, sticky, dispersive in part.