Virtueller Geocache
Bosporus - Bogaziçi

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

von Lady Biene     Deutschland

N 41° 00.827' E 028° 59.185' (WGS84)

 andere Koordinatensysteme
 Größe: kein Behälter
Status: kann gesucht werden
 Versteckt am: 17. Mai 2010
 Gelistet seit: 12. September 2010
 Letzte Änderung: 12. September 2010
 Listing: https://opencaching.de/OCAFEA
Auch gelistet auf: geocaching.com 

15 gefunden
1 nicht gefunden
0 Bemerkungen
1 Beobachter
1 Ignorierer
1338 Aufrufe
8 Logbilder
1 Empfehlungen

große Karte



Beschreibung    Deutsch  ·  English

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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Logeinträge für Bosporus - Bogaziçi    gefunden 15x nicht gefunden 1x Hinweis 0x

gefunden 03. April 2018, 16:57 pferseeer hat den Geocache gefunden

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

gefunden 13. Juni 2015 Triariel hat den Geocache gefunden

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.

Bilder für diesen Logeintrag:
Am AussichtspunktAm Aussichtspunkt

gefunden 22. März 2015 J_682 hat den Geocache gefunden

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.

gefunden 02. November 2014 D-Buddi hat den Geocache gefunden

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

gefunden 01. November 2014 EuroTraveller hat den Geocache gefunden

Während eines langen Wochenendes in Istanbul ist natürlich der Besuch dieses EC, neben den sonstigen Highlights dieser quirligen Metropole, Pflicht. So vereinten sich heute perfektes Sonnen-Herbstwetter mit völlig neuen Eindrücken. Definitiv eine Empfehlung wert! TFTC

Bilder für diesen Logeintrag:
@Bosporus - Bogaziçi @Bosporus - Bogaziçi