 | 1847 - 490 pages
...corals, with specimens of Pecten Poulsoni. The origin of this limestone like that of our white chalk, the softer varieties of which it much resembles, is I...called " bald prairies," but in some places, and at Bettis's Hill among others, the Orbitolite rock produces what is termed a " cedar knoll ;" the red... | |
 | 1847 - 492 pages
...corals, with specimens of Pecten Poulsoni. The origin of this limestone like that of our white chalk, the softer varieties of which it much resembles, is I...called " bald prairies," but in some places, and at Bettis's Hill among others, the Orbitolite rock produces what is termed a " cedar knoll ;" the red... | |
 | 1847 - 490 pages
...varieties of which it much resembles, is I believe due to the decomposition of corals, and like pur chalk downs, the surface of the country where it prevails...called " bald prairies," but in some places, and at Bettis's Hill among others, the Orbitolite rock produces what is termed a " cedar knoll ;" the red... | |
 | Sir Charles Lyell - 1851 - 602 pages
...that of our white chalk, which it much resembles, is, I believe, due to the decomposition of corals. The surface of the country where it prevails is sometimes marked by the absence of wood, like our chalk downs, or is covered exclusively by the Junipcrus Virginiana, as certain chalk districts... | |
 | Sir Charles Lyell - 1852 - 570 pages
...our white chalk, which it much resembles, is, I believe, due to the decomposition of the orbitoides. The surface of the country where it prevails is sometimes marked by the absence of wood, like our chalk downs, or is covered exclusively by the Juniperus Virginiana, as certain chalk districts... | |
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... stone, which hardens on exposure to the air, is not divided by lines of stratification, and is for the most part made up of Orbitolites of various sizes, with occasionally a Lunulite and other small corals, with specimens of Pecten Poulsoni. The origin... 