. The coral reefs of the tropical Pacific. Albatross (Steamer); Coral reefs and islands. 108 "ALBATROSS" TROPICAL PACIFIC EXPEDITION. islets, to show where the gaps existed, and finally is overwhelming the beach rock conglomerate, which only juts out in strips or points separated by reaches of sand of greater or less extent. Some of our photographs of coral shingle and coral boulders driven inland between shrubs and trees show that they penetrate a considerable dis- tance over the summit of the land rim (PI. 64). TJ^ey also show how coral fragments, from the size of one's head to the
. The coral reefs of the tropical Pacific. Albatross (Steamer); Coral reefs and islands. 108 "ALBATROSS" TROPICAL PACIFIC EXPEDITION. islets, to show where the gaps existed, and finally is overwhelming the beach rock conglomerate, which only juts out in strips or points separated by reaches of sand of greater or less extent. Some of our photographs of coral shingle and coral boulders driven inland between shrubs and trees show that they penetrate a considerable dis- tance over the summit of the land rim (PI. 64). TJ^ey also show how coral fragments, from the size of one's head to the merest chips, collect and become cemented together to form a conglomerate or breccia merely from the action of the wind and rain, and not under the influence of the sea, thus gradually covering the old ledge, whatever might be its composition, if it should constitute the foundation of an island. Our examination also shows how all the low land of the rim of an atoll is absolutely at the mercy of waves of great height, or even of a common storm, and how the material from the outer beach, and all kinds of coral shingle fragments, are pushed across between the shrubbery and large trees, killing some of those nearest the shore, and how the sea may cut gullies into the low land, either on the sea face, or through it, or down the lagoon slope. There is a fine sink on the southern point of the entrance to Makemo, behind the great shingle beach dam which has shut off from the sea the extensive flat area of that end of the island. Many blow-holes occur on the outer edge of the reef platform ; this is cut up by numerous shallow digitations, many of which are bridged to form the Gap across the Land Rim of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Agassiz, Alexander, 1835-1910. Cambridge, Pri
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcoralre, bookyear1903
