Karttjenesten viser undersjøiske landformer relatert til skredhendelser på havbunnen samt naturfenomener som kan forårsake ustabilitet i havbunnen og dermed utgjøre fare for undersjøiske installasjoner og/eller utsatte kystområder.

The map service shows submarine landforms related to landslides on the seabed as well as natural phenomena that can cause instability in the seabed and thus pose a danger to underwater installations and/or exposed coastal areas.

The map service shows submarine landforms related to landslides on the seabed as well as natural phenomena that can cause instability in the seabed and thus pose a danger to underwater installations and/or exposed coastal areas.

The dataset consists of over 62 000 data points, obtained during hydrographic surveys in fjords and coastal areas of Norway from Barents Sea in north to Oslofjord in south. Data points provide an indication of which type of sediment can be expected on the bottom (for example, whether it is coarse grained or fine grained). The distribution of seabed sediments is closely related to the physical conditions and tells about the submarine landscape, currents, waves and sedimentary processes.

Possibility of marine clay is based on Quaternary (superficial deposit) maps in different scales and data set for marine limit. Superficial deposit surface types below marine limit are classified according to the possibility of finding marine clay and can be roughly divided into six classes. The map service 'Possibility of marine clay' ('Mulighet for marin leire') has been created as a guide to reading a Quaternary geological map. It is important to point out that the map service does not display new information in relation to the Quaternary map. It is also important to check the scale of the Quaternary map, and it should also be taken into account that the estimated marine limit may be associated with some uncertainty. For this reason, polygons, which cross or lie near the marine limit, are included in the classification. However, a hatch shows which part of these polygons lies above the marine limit, and which can therefore generally be disregarded with regard to the possibility of marine clay. Exceptions will be areas where other soil types are on top of marine clay, but then the latter will only occur below the marine limit. Data for water-covered areas are not delivered below the marine limit because the surficial deposits have usually not been mapped (even if some polygons for technical reason cross the shoreline). It should be noticed, however, that marine clay deposits are common within water-covered areas below the marine limit including new, loose sediments. See below and use above link 'Display productpage' to read more about the application including uncertainties and use (only in Norwegian).

The map service shows submarine landforms related to landslides on the seabed as well as natural phenomena that can cause instability in the seabed and thus pose a danger to underwater installations and/or exposed coastal areas.

The map service shows submarine landforms related to landslides on the seabed as well as natural phenomena that can cause instability in the seabed and thus pose a danger to underwater installations and/or exposed coastal areas.

The map service shows submarine landforms related to landslides on the seabed as well as natural phenomena that can cause instability in the seabed and thus pose a danger to underwater installations and/or exposed coastal areas.