An exfoliation of the rock itself, you would call the houses that seem to grow there, so identical is the colour and character.
"The Letters of Elizabeth Barrett Browning (1 of 2)"
Frederic G. Kenyon
The laminae of this nucleus have not been so much loosened by decomposition; but the application of a ruder blow will produce a still further exfoliation."
"The Student's Elements of Geology"
Sir Charles Lyell
Old enough to know that this exfoliation is entirely natural.
"Way of the Lawless"
Max Brand