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The seven major estuaries are all separated from the Gulf of Mexico by the Texas barrier islands and various peninsulas on the mainland, making them into sheltered bays, [1] whereas several of the minor estuaries have no barrier islands or embayments but are riverine estuaries that empty directly into the Gulf. [3]
The inflow of both seawater and freshwater provide high levels of nutrients in both the water column and sediment, making estuaries among the most productive natural habitats in the world. [41] Most estuaries were formed by the flooding of river-eroded or glacially scoured valleys when sea level began to rise about 10,000-12,000 years ago. [42]
An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. [1] Estuaries form a transition zone between river environments and maritime environments and are an example of an ecotone.
There are two types of lagoons, coastal and oceanic/atoll lagoons. [19] A coastal lagoon is, as the definition above, simply a body of water that is separated from the ocean by a barrier. An atoll lagoon is a circular coral reef or several coral islands that surround a lagoon. Atoll lagoons are often much deeper than coastal lagoons. [20]
There are two types of lagoons, coastal and oceanic/atoll lagoons. [23] A coastal lagoon is, as the definition above, simply a body of water that is separated from the ocean by a barrier. An atoll lagoon is a circular coral reef or several coral islands that surround a lagoon. Atoll lagoons are often much deeper than coastal lagoons. [24]
A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into coastal lagoons (or barrier lagoons) and atoll lagoons. They have also been identified as occurring on mixed-sand and gravel coastlines.
Hynek spotted the system of lagoons through satellite imagery in April 2022 when he was studying another lagoon in northwestern Argentina that had smaller stromatolites with microbes that use ...
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