What does marlstone mean?
Marlstone is stone composed of, or closely resembling, marl, a soft sedimentary material containing clay and calcium carbonate. Unlike loose marl, which may crumble or behave as soil, marlstone is described as a stone or compact rock and can therefore be quarried, shaped, or used in construction. The word is uncommon today and occurs mainly in geological writing, historical building records, and regional descriptions of quarries and exposed rock formations. Its meaning is narrower than that of marl itself: marl can describe the material generally, while marlstone emphasizes its stony or consolidated form. The compound structure of the word makes its sense transparent, combining a familiar material with the ordinary word stone. Today it is most useful as a precise geological or historical term rather than as everyday vocabulary.
nounA stone or compact sedimentary rock of the kind called marl. The term is now mainly associated with geology and historical building or quarrying terminology.
- A stone or compact sedimentary rock of the kind called marl.
"The cliff exposes a thick band of pale marlstone above softer clay."
"Samples from the quarry showed that the marlstone varied considerably in hardness."
"The medieval building records refer locally to blocks of marlstone used in its foundations."
The plural is used when referring to separate pieces, types, or worked blocks of marlstone.
"Several marlstones from the quarry were retained for restoration work."
Marlstone is a rock named with admirable plainness: it is essentially stone made of marl.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does marlstone come from?
Marlstone is a compound formed in English from marl and stone. The word marl entered English through Old French marle, while stone is a native Germanic word. The compound appears in English in the early modern period and was later used especially for stone quarried from marl-bearing formations.
How marlstone is actually used
The word is uncommon in modern general English and is most likely to be encountered in geological, historical, architectural, or local quarrying contexts. In older usage, it may refer to a kind of building stone rather than marl in its general modern sense.
Easily confused with marlstone
Marl names the soft, clay-rich sedimentary material, whereas marlstone refers more specifically to stone consisting of or resembling that material.