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Updated: June 3, 2025
'Tis as if all the rains of heaven had been concentrated upon all the marls and clays of earth, and all the sticky stratum plastered down in a wiggling line of unascertainable length and breadth! Holes? As if a legion of sharpshooters had been detailed for the defence of Sandy Hook, and had excavated for themselves innumerable rifle-pits or caverns for the discomfiture of unhappy passengers!
Above, the river ripples in a broad sheet of mud; below, it plunges with violence over great cataracts and rapids. Above, the bad lands stretch on either hand. This is the region of the Painted Desert, for the marls and soft rocks of which the hills are composed are of many colors chocolate, red, vermilion, pink, buff, and gray; and the naked hills are carved in fantastic forms.
The white and green marls of the Headon series, and some of the accompanying limestones, often resemble the Eocene strata of France in mineral character and colour in so striking a manner as to suggest the idea that the sediment was derived from the same region or produced contemporaneously under very similar geographical circumstances. Solenastraea cellulosa, Duncan.
Unless one knows to the contrary, he should assume that a ton of finely pulverized limestone is worth more per ton than "agricultural lime." Marl. Marls vary in composition, as limestones do, but there are beds of chalky marl that contain very little clay and sand and are nearly a pure carbonate.
"When we consider the immense area over which this deposit is spread, the depth at which its formation is going on, and its similarity to chalk, and still more to such rocks as the marls of Caltanisetta, the question, whence are all these organisms derived? becomes one of high scientific interest. "Three answers have suggested themselves:
In the territory of Nebraska, on the Upper Missouri, near the Platte River, latitude 42 degrees N., a tertiary formation occurs, consisting of white limestone, marls, and siliceous clay, described by Dr. Among these, Dr. Leidy describes a gigantic quadruped, called by him Titanotherium, nearly allied to the Palaeotherium, but larger than any of the species found in the Paris gypsum.
Bembridge limestones, compact cream-coloured limestones alternating with shales and marls, in all of which land-shells are common, especially at Sconce, near Yarmouth, as described by Mr. F. Edwards. One of the bands is filled with a little globular Paludina. Anoplotherium commune. Binstead, Isle of Wight. Planorbis euomphalus, Sowerby. From this formation on the shores of Whitecliff Bay, Dr.
Throughout vast stretches you pass between tinted mesas, or tables, which face each other across flat valleys like painted palaces across the streets of Genova la Superba. They are giant splendors, hundreds of feet in height, built of blood-red sandstone capped with variegated marls.
They had been, plainly, sea-gnawn for countless ages; and may, at some remote time, have been all joined in one long ragged chine of hills, the highest about 1000 feet. They seem to be for the most part made up of marls and limestones, with trap-dykes and other igneous matters here and there.
The thickness of the marls is ten feet, and vegetable matter predominates so much in some layers as to form an imperfect lignite. Some of the upper beds at Monod abound in leaves of Proteaceae, Cyperaceae, and ferns, while in some of the lower ones Sequoia, Cinnamomum, and Sparganium are common.
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