ISS-26 Tidal flats and channels on Long Island, Bahamas

Autor/Urheber:

NASA

Shortlink:

https://www.dewiki.de/b/88f83

Quelle:

Wikimedia Commons

Größe:

4288 x 2848 Pixel (4090064 Bytes)

Beschreibung:

Tidal flats and channels on Long Island, Bahamas are featured in this image photographed by an Expedition 26 crew member on the International Space Station.

• The islands of the Bahamas in the Caribbean Sea are situated on large depositional platforms (the Great and Little Bahama Banks) composed mainly of carbonate sediments ringed by fringing reefs – the islands themselves are only the parts of the platform currently exposed above sea level. The sediments are formed mostly from the skeletal remains of organisms settling to the sea floor; over geologic time, these sediments will consolidate to form carbonate sedimentary rocks such as limestone.
• This detailed photograph provides a view of tidal flats and tidal channels near Sandy Cay on the western side of Long Island, located along the eastern margin of the Great Bahama Bank. The continually exposed parts of the island have a brown coloration in the image, a result of soil formation and vegetation growth (left).
• To the north of Sandy Cay an off-white tidal flat composed of carbonate sediments is visible; light blue-green regions indicate shallow water on the tidal flat. Tidal flow of seawater is concentrated through gaps in the anchored land surface, leading to formation of relatively deep tidal channels that cut into the sediments of the tidal flat. The channels, and areas to the south of the island, have a vivid blue coloration that provides a clear indication of deeper water (center).

Lizenz:

Public domain

Credit:

http://spaceflight.nasa.gov/gallery/images/station/crew-26/html/iss026e005121.html

Bild teilen:

         

Weitere Informationen zur Lizenz des Bildes finden Sie hier. Letzte Aktualisierung: Sun, 16 Apr 2023 23:26:44 GMT

Relevante Bilder

Relevante Artikel

Als marine Sedimente oder Meeressedimente bezeichnet die Geologie jene Sedimente, die sich in Meeresbecken ablagern bzw. abgelagert haben. Sie stellen weltweit den größten Anteil unter sowohl den rezenten Sedimenten als auch den Sedimentgesteinen. Die Masse unter den Meeressedimenten stellen wiederum die Schelfsedimente. Den Meeressedimenten gegenüber stehen die terrestrischen Sedimente die alle Ablagerungen des Festlands, einschließlich der Süßgewässer, umfassen. .. weiterlesen