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Bosporus - Bogaziçi

 Istanbul, the only city in the world on two continents Europe and Asia, both sides of the Bosporus.

di Lady Biene     Germania

N 41° 00.827' E 028° 59.185' (WGS84)

 Conversione coordinate
 Dimensioni: nessun contenitore
Stato: disponibile
 Nascosta il: 17. maggio 2010
 Pubblicata dal: 12. settembre 2010
 Ultimo aggiornamento: 12. settembre 2010
 Listing: https://opencaching.it/OCAFEA
Pubblicata anche su: geocaching.com 

14 trovata
1 non trovata
0 Note
1 Osservatore
1 Ignorata
1301 Pagina visite
7 Log immagini
Storia Geoketry
1 Raccomandazioni

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Descrizione    Deutsch  ·  English (Inglese)

English Version [Deutsche Übersetzung unten / Türkçe versiyonu asagida]

The Bosporus

The Bosporus is the connection between the Marmara Sea in the south and the Black Sea in the north. It is a part of the border between Europe and Asia. On both sides of the strait the city of Istanbul applies. At the southern end lies the Golden Horn, the harbour bay of the former capital of the osmanian empire, one of the biggest physical harbours of the world.

About the origin of the Bosporus there are two theories about which the scientists argue until today.



The biblical flood

Following the theory of two American geologists, the biblical flood has its origin at the Bosporus. Place of the flood was the Black Sea that had dried up after the last ice age to a salty brackish water lake. A connection with the oceans did not exist. 7500 years ago the rock dam suddenly broke, which had held back the glaze floods in the Mediterranean Sea. The water flowed out years with high pressure through the rock tube between Asia and Europe, making the level of the Black Sea rise by 15 centimetres each day. A leveling of the seas resulted. The people fled before the floods – the event engraved so deeply into the collective memory, that the biblical flood myth took its origin.

Gradual increase

Another theory claims, the rivers Danube, Don and Dnjepr poured into the Black Sea. They all led large amounts of melt water. The sea rose and slowly ran over, resulting in a flood. Nevertheless, this was far less spectacular than in the first scenario. During about thousand years the water about the Bosporus threshold flows out by a deep gulch in the just twenty metre deeper situated Marmara Sea.


Two currents

So conflicting as the theories of its history, are the two currents are of the Bosporus. One flows in the surface and a weaker undercurrent in about 40 metre depth. The upper stream comes from the Black Sea. It is less salty and -  hence - lighter. It flows to the lower situated Marmarameer. The unterstream flows with its saltier water in opposite direction.





Bosporus means translated "cattle ford” or “cow ford" - a name with mythological origin. God's father Zeus fell in love with the nice Io, one of the priests of his wife Hera. He kidnapped her and transformed her into a cow to hide her from his jealous spouse. But Hera noticed the cheat and sent a gadfly after Io, who escaped in her animal figure. On the escape, the beauty crossed the ford between Asia and Europe, which, from now on, got its name.



  • Answer the following questions and send the answers in a mail. You do not have to wait for admittance, if something is wrong, I’ll contact you.

  • Take a photo of you or your GPS at a point with a scenic view over the Bosporus. The given coordinates lead to the beautiful terrace in the courtyard of the Topkapi-palace. If you do not want to pay the access fee, you may also answer the questions from the Kennedy Cd.


  •  Look to the asian side oft the Bosporus. Guess how far it is to the other side at this place. By the way: The Bosporus is – on it’s thinest spot about 700 meters wide and about 2.5 kilometer at it’s widest.

  • How many mountain peaks do you see on the other side? Describe them.

  • Take some time and watch the ships passing by – and also those waiting for passage. What do you think: How many ships pass the straight each day?

  • In which direction the wind has to blow, to change the surface flow of the Bosporus?

  • What are the names oft he two american geologists setting up the biblical-flood-theory?



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Log per Bosporus - Bogaziçi    trovata 14x non trovata 1x Nota 0x

trovata 03. aprile 2018, 16:57 pferseeer ha trovato la geocache

Cache Nummer 500! Danke fürs Zeigen und die Infos. Pferseeer mit Luna-Fortuna.

trovata 13. giugno 2015 Triariel ha trovato la geocache

Bei einer Führung durch den Topkapi-Palast am GZ eine kleine Pause gemacht und dabei den schönen Ausblick genossen.

Danke für die vielen Informationen und für das Zeigen.

Immagini per questo log:
Am AussichtspunktAm Aussichtspunkt

trovata 22. marzo 2015 J_682 ha trovato la geocache

The view from the palace is great. Thanks a lot for the background information on the Bosporous especially on the theory of the biblical flood. Very interesting.

For my log picture please see gc log.

trovata 02. novembre 2014 D-Buddi ha trovato la geocache

Wir hätten fast vergessen die Antworten zu ermitteln so schön war die Aussicht hier oben, Istanbul ist schon eine Tolle Metropole!

No Trade

MfG Jörg

trovata 20. settembre 2014 bloslo ha trovato la geocache

Unser Kurzurlaub in Istanbul wurde u.a. deshalb ein großes Erlebnis, weil wir diverse Caches besucht haben und damit an viele interessante Ort gekommen sind. So waren wir auch im Topkapi-Palast, auf dem Camlica-Hügel und mit dem Boot auf dem Bosporus, womit die Grundlagen für diesen EC gelegt waren. Dazu noch ein paar Daten geholt, so dass wir guten Gewissens hier loggen.

Danke für die vielen Informationen und die nette Gestaltung des EC! icon_smile.gif

Immagini per questo log:
Blick vom Camlica-HügelBlick vom Camlica-Hügel
Click to view larger imageClick to view larger image

last modified on 02. maggio 2016