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![The marine use environment on Krossøy, Austrheim](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/1/kvh_306-1.jpg?itok=G4q9_8h8)
Krossøy
Furthest north in the island community Rongevær, at the entrance to Fensfjorden, lies Krossøy. Belonging to the farm are the islands of Krossøy, Husøy, Kårøy, Lyngkjerringa, Søre Kjerringa, Rotøy and Kuhovet. All of them have been inhabited. On Krossøy itself today there are four holdings. The marine use environment here is one of the best preserved along the West Norwegian coast.
![The lobster park in Espevær](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/bomlo_39.jpg?itok=QWK2IaA7)
![The power station at Gåssand, Os](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/1/kvh_237-1-1.jpg?itok=kDd6e2yS)
Gåssand
The 28th November 1914 was a day to remember for the Os inhabitants. This was the day they could turn the switch on the wall and have electric light in their houses. It was like opening the door on the future when the power station at Gåssand was put into operation.
![Frostrøyk i Osdalføret.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/os_15_b_0.jpg?itok=LqTqmgE7)
Søfteland
If you drive between Søfteland and Ulven on a clear spring morning, or an evening in late autumn, you are advised to be careful on the turns. The temperature on the road can fall to under 0 °C here long before other places in the municipality. On clear, still nights the earth's surface chills quite a bit. In exposed areas a layer of cold air develops very near the ground and the road surface can easily chill to below freezing.
![Geologist William Helland-Hansen examining a quartz conglomerate in the Ulven Syncline on one of the hills by the north west end of Lake Ulvenvatnet.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/os_31.jpg?itok=kdZe21Du)
Ulven
In the region of Ulven phyllite occurs with Hordaland's youngest fossils, and a beautiful quartz conglomerate. The phyllite and conglomerate got squeezed into the bottom of an ancient oceanic crust, made of gabbro and greenstone, in the heart of the Caledonide mountain chain.
![Finnås and Finnåsvika](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/bo_10.jpg?itok=NqIpTrFN)
Finnås
At Flintaneset by Finnåsvika, in the centre of the municipality, we find the most beautiful and best preserved igneous rocks in western Norway. We must go to Hawaii or Island to find as fine structures as at Bømlo.