There is no such thing as Russian art pure and simple; and yet over the broad territory which forms the dominion of the Tzar, we know there have been in the past centuries large, self-dependent communities, who must have been more or less skilled in the various arts, but of whom we know only what may be gathered from half-obliterated ruins of temples and of tombs.
"Due North or Glimpses of Scandinavia and Russia"
Maturin M. Ballou
The original bedding is sometimes entirely obliterated, and in most cases of well-defined cleavage is always more or less obscure.
"Geology"
James Geikie
But there are cases where even the bedding becomes obliterated, and it is then much more difficult to determine the origin of the rocks.
"Geology"
James Geikie