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1
The
red
marl
must almost certainly have been black slate somewhere, somewhen.
2
The salt rock in Cheshire lies in strata of
red
marl
.
3
Green and
red
marl
,
shale, and shaly limestone with some veins of gypsum.
4
Rich lowlands and oolites suit the cereals;
red
marl
produces wonderful grazing grass; bare uplands are best for gorse and heather.
5
The difference in colour between black slate and
red
marl
is caused simply by the oxidation of the iron in the slate.
6
And if my readers want a probable cause why the sandstones lie undermost, and the
red
marl
uppermost-canthey not find one for themselves?
7
And the
red
marl
-
the
great
deposit of
red
marl
which covers a wide region of England-whyshould not it have come from the same quarter?
8
But its rich
red
marls
,
wherever they come to the surface, are one of God's most precious gifts to this favoured land.
9
(* Magnesian limestone is of a straw-yellow colour, and contains madrepores: it lies beneath
red
marl
,
or muriatiferous red sandstone.)
red
marl
red