Deep down between the stone polished phyllite bedrock in Bordalsgjelet canyon, there is a cascading river. In close cooperation with hard polishing stones, the water has carved into the bedrock for thousands of years - and is still doing so today.
During the last ice ages, parts of the Voss river system were stolen and sent down Nærøydalen valley to Nærøy Fjord (Nærøyfjorden). Before this big river theft all of the rivers ran all the way from their sources in the mountains near the innermost part of the Sognefjord further southwards towards Voss. Evidence of the theft is still clearly visible in the terrain.
The sediment that was deposited from the river Dyrvo has created the fan-shaped delta Rekvesøyane. The bit of land farthest out toward the water gets periodically flooded, especially during snow melt and after periods of much rain.
It is not surprising that there are several folk tales connected to the large and unusual scree deposit that is found at Langeland, uppermost in Teigdalen. It is said that folk have been taken into the mountains by these stone blocks and have come back and told about how the wood nymphs live. It is also said that packs of thieves hid here in the old days, both themselves and the treasures they had stolen.
The Vosso is Hordaland's main artery, she has never run more richly than in our times, and no other river in western Norway carries so much water. The increase in the amount of water comes mainly from hydropower development, due to the transfer of water from other water systems. Climate change can also be a reason that the Vosso carries more water than before.