tilestone

The colour was red like the tilestone when it is new-burnt, with black spots therein like black freckles -- fouler than the tilestone.

Revelations of Divine Love 1901

Above this gray tilestone formation lies the Upper Old Red Sandstone, with its peculiar group of ichthyic organisms, none of which seem specially identical with those of either the Caithness or the

The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed Hugh Miller 1829

It must, however, be stated, on the other hand, that the crustaceans of the gray tilestones of Forfar and Kincardine not a little resemble those of the Upper Silurian and red tilestone beds of England; and that, judging from the ichthyodorulites found in both, their fishes must have been at least generically allied.

The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed Hugh Miller 1829

I deemed it fifteen years ago, when our highest authority on the subject not only regarded the tilestone of the Silurian regions of England as a member of the Old Red Sandstone (an arrangement which I am still disposed to deem the true one), but also held further, that there had been detected in this formation near Downtown Castle, Herefordshire, broken remains of _Dipterus macrolepidotus_, one of the best marked ichthyolites of the flagstones of Caithness and Orkney.

The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed Hugh Miller 1829