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![Under the grass fields lie large quantities of sand and gravel.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/mo_24.jpg?itok=e4ePAE19)
Nedre Helland- Sand Quarries
The three spades in the municipal coat of arms for Modalen are sand spades. Sand quarrying has brought income and employment. As much as 70,000-80,0000 tonnes of sand and gravel left the municipality each year since the turn of the millennium, to be used as cementing sand. Why is Modalen endowed with so much sand?
![Sketch showing the process of formation of an esker.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/skisse.jpg?itok=dTA78127)
![Moraine ridges, Fruo.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/eid_22a.jpg?itok=V9Vy57R6)
Fruo
At Fruo, nature has built its own little "Chinese wall ". Some kilometers south of the Vøringsfossen waterfall, there are a number of moraine ridges, the longest and most notable of their kind in Hordaland.
![The Eidfjord terrace as seen from Lægreid, presumably in the early 1900s.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/eid_36.jpg?itok=_A8sZyMW)
Hæreid- geology
The Eidfjord terrace is a gigantic ridge that reaches up more than one hundred metres from the city centre in Eidfjord. It serves as a powerful natural monument left behind by the ice when it retreated.
![Bordalsgjelet](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/voss_33.jpg?itok=xPd4kUeG)
Bordalsgjelet
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.
![Bømoen toward the north.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/voss_52.jpg?itok=mV3IWyRp)
![Pump house for the Vossevangen water works.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/nv_460.jpg?itok=rrup6P_h)
![Voss Spruce Toward Istad](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/voss_50.jpg?itok=YKDZ42oi)
Vossagran
How did the spruce tree get to Voss? Did the seed or small spruce plants get help from people, for example, to make it here unscathed? Nobody knows.
![Otterstadstølen](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/mo_4.jpg?itok=yFY5zoII)
Otterstadstølen
Otterstadstølen lies in an idyllic grassy plain surrounded by rich forest, but also with high mountains close by. The mountainsides are steep and typical of this part of the county. The same cannot be said about the forest. This spruce forest has been able to develop freely for hundreds of years. Otherwise in the county, only Voss has spruce forest.
![View in over Mostraumen.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/mo_16.jpg?itok=GnR34JLO)
Mostraumen
Until 1743 the people from Modal had to wait for a flood in MOSTRAUMEN before they could draw their boats up the river current, and then row back across Lake Movatnet. But, that year the flood opened a free passageway all the way to Mo. Hordaland had gained a new tidal waterway.