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Scandic Hotels – in all major cities from north to south
Nordic Choice Hotels – a different hotel company
Thon Hotels – with fantastic breakfast
Radisson Blu Hotels – discover your favourite destinations
Classic Norway Hotels – From distinctive hotels to authentic fisherman's cabins
Citybox – modern and affordable hotels in a central location
DanCenter – your specialist in holiday homes in Norway
Norgesbooking – book your perfect cabin stay in Norway
Campcation – book camping all across Norway with Campcation
Rauland – Skiing in stunning mountain scenery
Vy – travelling by train has never been easier
SJ NORD – the adventure starts on the train
Vy express – travel with bus throughout Norway
NOR-WAY Bussekspress – experience amazing scenery by bus
Widerøe – the largest regional airline in Scandinavia
DFDS – Europe’s leading ferry operator 2012-2021
AutoEurope – always a smooth car rental experience
Rent-A-Wreck – the smart car rental alternative
Arctic Campers – Norway’s camper van rental
Cabin Campers – your cottage on four wheels
Hurtigruten – "The World’s Most Beautiful Sea Voyage"
Fjord Tours – Home of Norway in a nutshell® - Norway’s most popular tour
Authentic Scandinavia – Travel created by locals
Up Norway – Bespoke luxury tailored by insiders
Norrøna Hvitserk – expeditions and adventure holidays
Booknordics.com – hundreds of activities, tours and day cruises in Norway
Brim Explorer – silent fjord tours by electric catamaran
Fjord Travel – let us show you the beauty of Norway!
Go Fjords – tours and activities all over Norway
50 Degrees North – unforgettable tailor-made and small group tours to Norway
Discover Norway – skiing, biking and hiking tours in Norway
Norwegian Holidays – low-price package holidays with Norwegian. Flight, hotel and rental car
Stromma – sightseeing, excursions and experiences with bus, boat and train
My Nordic Travel - Do It Yourself, make your own itinerary.
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Skien has an exceptional geological diversity. A tour across the Skien-Gjerpendalen valley is a tour through 1500 million years of geological history.
Skien is a community with an exceptional geological diversity. A tour across the Skien-Gjerpendalen valley is a tour through 1500 million years of geological history.
To the west and northwest of the city Centre lies ancient basement rock. These rocks are old, more than 1000 million years, with traces of mountain building that took place perhaps more than 1500 million years ago. In the Gjerpensdalen valley one sees a combination of limestone’s overlain by marine clay.
The limestone ridges trend in a north-south direction, and they represent a seafloor formed in an ancient tropical sea. About 450 million years ago, the continental plate that Norway lies on was located south of the equator. The continental plate was largely covered by a sea, in which many plants and animals lived. Many of the animals had calcareous shells, and it is the remains of these calcareous shells that form the ridges, layer by layer. On Kapitelberget, the Krypt Church is built in the remains of a coral reef from this time.
The marine clays in Gjerpensdalen valley were formed in an artic fjord some thousands of years ago. When the big ice sheet that covered Scandinavia 12,000 years ago melted, sea water flowed in over our depressed land. The clays help to make the soil fertile. Another contribute to the fertility of the soil the basalts to the south of the valley. The basalts are lavas that flowed out from the volcanoes about 300 million years ago. There is lush leafy vegetation on these volcanoes deposits, that is very visible in the terrain.