marlstonen.
/ˈmɑːlstəʊn/, U.S. /ˈmɑrlˌstoʊn/ Rock consisting of, or having the composition of, consolidated marl; marlite. Also: spec. an iron-rich oolitic limestone of the Middle Lias of England, or the group of iron-rich rocks in which it occurs.
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the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > other argillaceous
tough-stonea1641
waxen vein1681
mudstone1736
marlstone1766
marlite1794
pelite1879
lutite1904
the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > limestone > oolite
spawn-stone1668
ammonite1706
ammites1750
kern-stone1753
marlstone1766
oolite1802
roestone1804
1766 T. Amory Life John Buncle II. vii. 227 The famous dropping-well or petrifying water..rises 15 yards below the top of a mountain of marle stone.
1799 W. Tooke View Russ. Empire I. 142 There are likewise..mica spathosa, verd, serpentine,..and marlstone.
1839 Penny Cycl. XIV. 429/1 Marlstone, sandy, calcareous, and irony strata, which divide the upper from the lower lias clays.
1850 D. T. Ansted Elem. Course Geol. xv. 390 The Marlstone of Dumbleton hill is crowded with interesting organic remains.
1903 A. Geikie Text-bk. Geol. (ed. 4) II. 1132 The Middle Lias consists of argillaceous and ferruginous limestones (Marlstone).
1979 D. Walcott Star-apple Kingdom 46 The lime groves and fences of marl stone.
1996 Palaeogeogr., Palaeoclimatol., Palaeoecol. 126 227 The marlstone semicouplets are..frequently laminated, rich in pyrite and organic matter.
This entry has been updated (OED Third Edition, December 2000; most recently modified version published online March 2022).
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n.1766