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"Atoll, a coral reef surrounding a pool of shallow water, usually called a lagoon. The atoll is formed by the building of a coral reef on a circular or nearly circular foundation. It is usually broken in one or more places so that the lagoon is connected with the surrounding waters." -Foster, 1921

Atoll

"Atoll, a coral reef surrounding a pool of shallow water, usually called a lagoon. The atoll is formed…

"Diagram illustrating Darwin's theory of the formation of Atolls." -Geikie, 1893

Atoll Formation

"Diagram illustrating Darwin's theory of the formation of Atolls." -Geikie, 1893

"Atolls. A coral island commonly consists of a narrow rim of reef, surrounding a lagoon." -Dana, 1880

Coral Island of Atoll

"Atolls. A coral island commonly consists of a narrow rim of reef, surrounding a lagoon." -Dana, 1880

"represents a section of an island, from the ocean (o) to the lagoon (l). On the ocean side, from o to a, there is shallow water for some distance out; and where not too deep, the bottom is covered here and there with growing corals. Between a and b there is a platform of coral rock, mostly bare at low tide, but covered at high ... b to d is the wooded portion of the island. The whole width (is) from the beach (b) to the lagoon (c)." -Dana, 1880

Section of Coral Island of an Atoll

"represents a section of an island, from the ocean (o) to the lagoon (l). On the ocean side, from o…

The cross-section of a beach.

Beach

The cross-section of a beach.

"Section of a beach defined by High- and Low-water Mark." -Geikie, 1893

Beach Section

"Section of a beach defined by High- and Low-water Mark." -Geikie, 1893

Flabellifera are a type of isopod. Their bodies end in a tail fan, made by the last pair of appendages and the telson (end piece). This species is parasitic, sharing the title of 'fish lice' with other certain parasitic copepods.

Cirolana Microphthalmia

Flabellifera are a type of isopod. Their bodies end in a tail fan, made by the last pair of appendages…

"Typical deployment of tidal velocity current meter." -Goodwin, 1996

Current Meter

"Typical deployment of tidal velocity current meter." -Goodwin, 1996

"Maps to illustrate the supposed stages in the erosion history of the Pomperaug River." -Walcott, 1901

Erosion Stages

"Maps to illustrate the supposed stages in the erosion history of the Pomperaug River." -Walcott, 1901

"Diagram illustrating the gradual filling up of lakes by the encroachment of vegetation, and also the stages in the origin of peat and marl deposits in lakes. The several plant associations of the Bog series, displacing one another, belong to the following major groups: (I) O. W., open water succession; (2) M., marginal succession; (3) S., shore succession; (4) B., bog succession, comprising the bog-meadow (Bm), bog-shrub (Bs) and bog-forest (Bf); and (5) M. F., mesophytic forest succession." -Gager, 1916

Lake and Vegetation

"Diagram illustrating the gradual filling up of lakes by the encroachment of vegetation, and also the…

"Diagram suggesting the development of a barrier reef and an atoll, successively, from a fringing reef, by sinking. 1, Fringing reef, formed in shallow water; 2, barrier reef, developed from fringing reef after subsidence; 3, the atoll which succeeds the barrier reef." -Salisbury, 1919

Barrier Reef Development

"Diagram suggesting the development of a barrier reef and an atoll, successively, from a fringing reef,…

A barrier reef is a coral reef that is far from land.

Barrier Reef

A barrier reef is a coral reef that is far from land.

A fringing reef is a coral reef that is close to land.

Fringing Reef

A fringing reef is a coral reef that is close to land.