Calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and silt.
1 Those of the Tidewater section are summed up in its marls .
2 The sandstone and marls are immensely older than the boulder-clay.
3 There are several different-colored marls , each possessing different qualities.
4 The dark red, or black astringent wines, are produced upon the white marls and cretaceous limestone.
5 The gypsiferous and saliferous marls of Shellata, Suk Ahras and Ain Nussi have yielded Triassic fossils.
6 Often these marls are richly colored and variegated.
7 Red jasper is abundant in this locality, and is generally found in small pieces embedded in the marls .
8 The Tuscan alabaster occurs in nodular masses, embedded in limestone, interstratified with marls of Miocene and Pliocene age.
9 The most common are the red and the white, though there are grey, brown, blue, and yellow colored marls .
10 Magnesia may replace lime to some extent in such marls , but the firing temperature must be higher when magnesia is present.
11 The highest beds, consisting of quartzites, shales, marls and sandstones with the remains of fucoids, are found in the Jurjura and Shellata.
12 From the same beds, and in marls alternating with the sands, remains of the elephant, rhinoceros, and other mammalia have been exhumed.
13 But its rich red marls , wherever they come to the surface, are one of God's most precious gifts to this favoured land.
14 These latter are often found in the Triassic fish-beds of Connecticut and New Jersey, and in the Cretaceous marls of the latter State.
15 They seem to be for the most part made up of marls and limestones, with trap-dykes and other igneous matters here and there.
16 This region appears to be entirely free from the limestones and marls which give to the Lower Platte its yellow and dirty color.
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