madreporic

Tonga Tabou is of madreporic formation, with a thick covering of vegetable soil, favourable to an abundant growth of shrubs and trees.

Celebrated Travels and Travellers Part III. The Great Explorers of the Nineteenth Century Jules Verne 1866

The islands are for the most part high, terminating in volcanic peaks; but some are of opinion, judging from the arrangement of the lagoon, that they are of madreporic formation.

Celebrated Travels and Travellers Part III. The Great Explorers of the Nineteenth Century Jules Verne 1866

The usual measures in such a case were taken immediately, but outside the chain of madreporic rocks no depth could be sounded.

Celebrated Travels and Travellers Part 2. The Great Navigators of the Eighteenth Century Jules Verne 1866

This feature alone was indicative of the madreporic formation of the soil, simple deposit, which was not yet, but which in time would become, an island.

Celebrated Travels and Travellers Part 2. The Great Navigators of the Eighteenth Century Jules Verne 1866

In general, that which rises above the waters is only breccia, or aggregate of madreporic fragments cemented by carbonate of lime, broken shells, and sand.

Travels to the Equinoctial Regions of America 1851

On a layer of sand and land shells, five to six inches thick, covered by a fragmentary madreporic rock, rises

Travels to the Equinoctial Regions of America 1851

On a layer of sand and land shells, five to six inches thick, covered by a fragmentary madreporic rock, rises a forest of mangroves (Rhizophora).

Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 Alexander von Humboldt 1814

In general, that which rises above the waters is only breccia, or aggregate of madreporic fragments cemented by carbonate of lime, broken shells, and sand.

Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 Alexander von Humboldt 1814