Definition from Wiktionary, the free dictionary
- containing stalactites
1822, Phillip Parker King, Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]:
- But the true theory of these concretions, under any modification of temperature, is attended with considerable difficulty: and it is certain that the process is far from being confined to the warmer latitudes. Dr. Paris has given an account of a modern formation of sandstone on the northern coast of Cornwall;** where a large surface is covered with a calcareous sand, that becomes agglutinated into a stone, which he considers as analogous to the rocks of Guadaloupe; and of which the specimens that I have seen, resemble those presented by Captain Beaufort to the Geological Society, from the shore at Rhodes. Dr. Paris ascribes this concretion, not to the agency of the sea, nor to an excess of carbonic acid, but to the solution of carbonate of lime itself in water, and subsequent percolation through calcareous sand; the great hardness of the stone arising from the very sparing solubility of this carbonate, and the consequently very gradual formation of the deposit--Dr. MacCulloch describes calcareous concretions, found in banks of sand in Perthshire, which present a great variety of stalactitic forms, generally more or less complicated, and often exceedingly intricate and strange,*** and which appear to be analogous to those of King George's Sound and Sweer's Island: And he mentions, as not unfrequently occurring in sand, in different parts of England (the sand above the fossil bones of Norfolk is given as an example) long cylinders or tubes, composed of sand agglutinated by carbonate of lime, or calcareous stalactites entangling sand, which, like the concretions of Madeira, and those taken for corals at Bald-Head, have been ranked improperly, with organic remains.
1910, Nathaniel Southgate Shaler, Outlines of the Earth's History:
- In this manner, much as in the case of the growth of stalactitic matter between the blocks of stone in the roofs of a cavern, large fragments of rock, known as "horses," are often pushed out into the body of the vein.
1916, Fedor Jagor; Tomas de Comyn; Chas. Wilkes; Rudolf Virchow., The Former Philippines thru Foreign Eyes:
- From this point both the landscape and the rocky cauldron are visible, and the latter is seen to be the remainder of a stalactitic cavern, the roof of which has fallen in.