Chili, or anywhere on the western coast of South America, naturally led Mr. Darwin to the conclusion that "where the bed of the sea is either stationary or rising, circumstances are far less favourable than where the level is sinking to the accumulation of conchiferous strata of sufficient thickness and extension to resist the average vast amount of denudation.".    From Wordnik.com.  [The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology)] Reference

Amidst the first strata I suffered the watery action to expend itself upon cooling, crystallized masses; and by the time I had got him into the tertiary period, amongst the transition chalks of Maestricht and the conchiferous marls of Gosau, he was ready for a new wife.    From Wordnik.com.  [The Caxtons — Complete] Reference

Item, in the adjoining pigeon-hole, a goodly collection of pebbles with holes in them, preserved for the same reason, in company with a crooked sixpence; item, neatly arranged in fanciful mosaics, several periwinkles, Blackamoor's teeth (I mean the shell so called), and other specimens of the conchiferous ingenuity of.    From Wordnik.com.  [My Novel — Complete] Reference

The absence of any deposits of importance containing recent shells in Chili, or anywhere on the western coast of South America, naturally led Mr. Darwin to the conclusion that ‘where the bed of the sea is either stationary or rising, circumstances are far less favourable than where the level is sinking to the accumulation of conchiferous strata of sufficient thickness and extension to resist the average vast amount of denudation.    From Wordnik.com.  [II. Uniformity Of Change] Reference

Observations on South America, "1846) deals with the causes of the absence of recent conchiferous deposits on the coasts of South.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 2] Reference

Of the three great divisions of which the geologic scale consists, -- Palæozoic, Secondary, and Tertiary, -- the first, or ichthyic period, is marked chiefly, not by its great fishes, but by the peculiar character of its brachipodous and cephalopodous mollusca, and in its earlier stages by its three-lobed crustaceæ; the second or reptilian period was emphatically the period of the ammonite and belemnite; while the third and last, or mammalian period, was that of gastropodous and conchiferous molluscs, impressed, generically at least, by all the features of the group which still exists in our seas.    From Wordnik.com.  [The Testimony of the Rocks or, Geology in Its Bearings on the Two Theologies, Natural and Revealed] Reference