The barrier islands shelter and protect the mainland from the powerful forces of wind, waves, tides, currents and the ravages of storms and hurricanes. They shelter the estuaries that form behind the barriers.
Barrier islands form as waves repeatedly deposit sediment parallel to the shoreline. As wind and waves shift in keeping with weather styles and neighborhood geographic features, those islands constantly pass, erode, and grow. They can even disappear entirely.
Key Biscayne is a barrier island found at the bottom give up of a sequence of islands that stretches alongside the southeastern coast of Florida. Barrier islands are construct-united states of sand that shape alongside the coast of larger land bodies.
Barrier islands are critically crucial in mitigating ocean swells and different hurricane events for the water systems at the mainland aspect of the barrier island, in addition to defensive the coastline. This efficaciously creates a unique environment of exceedingly low strength, brackish water.
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Answer:
The answer is Option C: Index fossils.
Explanation:
Index fossils are used to identify geologic periods or faunal stages in rock layers. These fossils must have a wide geographic distribution and manifest obvious evolutionary trends to help geologists and others who need this geological data to better understand the time scale and to pinpoint a time period. For example, ammonites were common during the Mesozoic Era, but they were extinct by the Cretaceous period. Geologists would use ammonites to help determine this time frame if present.
Ir is the third opinion, 100km area
