Dark Brown Sediments in Gulf of Ob, Russia – August 14th, 201068.8N 73.5E
The dark brown body of water towards the center of this image is the Gulf of Ob (also known as Ob Bay). It is an immense bay of the Arctic Ocean in Northern Russia, at the head of which is the mouth of the Ob River.
This Gulf flows into the Kara Sea between the Yamal and the Gydan peninsulas. It is about 1,000 km (600 mi) long and varies from about 50 km (30 mi) to 80 km (50 mi) in width, running generally north and south.
Here, the bay appears dark brown in color due to the presence of sediments from the Ob River and to its relative shallowness, with an average depth from ten to twelve metres.