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Re: Geography Trivia
Posted By: Howard, on host 68.19.30.31
Date: Tuesday, November 11, 2003, at 05:45:51
In Reply To: Re: Geography Trivia posted by Sam on Monday, November 10, 2003, at 19:24:36:

> > I *have* noticed some of the other questions may have wrong answers, though. For example, the answer "Keys" to "what are those islands in Florida called?" is wrong? Since when?
>
> The question is "What are the long, low islands on Florida's east coast called?" The Florida Keys are not long, low islands on Florida's east coast.

They are called barrier islands. They form when waves and currents deposit sand off shore. They tend to be long and narrow, so a lagoon forms between the island and the mainland. The islands are given proper names such as Cape Canaveral or Hutchinsons Island. The lagoons have names like Banana River, Indian River, or Lake Worth. People call them rivers and lakes, but they are still lagoons. Most have tidal currents and in many places the Intercoastal Waterway follows these lagoons.

I may have submitted that question, and if I gave Keys as a correct answer, it was an error. Having lived in Fort Pierce, Florida in my teens, I never thought of those islands as anything but barrier islands.

By the way, given enough time, the lagoons silt in and connect the islands to the mainland. The effect is to move the shoreline out to sea. By the time this happens, a new barrier island, may be forming out beyond the breakers. Florida is growing. Some of the places where I used to swim in the mid-20th century are now dune fields a hundred meters or more back from the beach. Shore lines never stop changing.

In the Keys, when you come off a bridge on an island, look for the limestone foundation. It may be covered by sand or vegetation, but in many cases it is easily visible. Most of the sandy parts of Florida are no older than the end of the last ice age, but those old reefs under the Keys may date back one of the interglacial periods, more than a million years ago. But geologists think of a million years ago as yesterday.
Howard

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