Shallow gas

Status: Submitted

Definition: The dataset is a collection of landforms and phenomena in and on the seabed caused by natural gas in the seabed sediments. Shallow gas can originate from both sedimentary rocks and overlying sediments. Typical landforms are pockmarks and diapirs, but shallow gas are also displayed as strong reflectors (bright spots) or gas blanking on seismic profiles. Gas leakage from the seabed has great ecological significance for plant and animal life in the sea, e.g. it is typical with bacterial mats occur around such places. Gas and gas hydrates in the sub-seabed sediments also have an impact on seabed stability and climate change.

Updated: 24.09.2023
Submitter: Norwegian Mapping Authority
Owner: Geological Survey of Norway

Usage

Gas hydrates and shallow gas have an impact on seabed stability, climate change and ecological diversity on the seabed, at the same time when it is considered as a geological resource due to its high methane content. The knowledge on these can be used by the oil industry in hydrocarbon exploration.

Theme: Geology

In scope of Inspire Directive: No

DOK according to KMD-definitions: No

In scope of Norway digital agreement: Yes

Land-use plans subject to law (PBL): No

In scope of the Geodata Act: No

Mareano: Yes

Ecological Base Map: No

Modellbaserte vegprosjekter: No

DOK-status

DOK-status: Proposal

DOK-status date approved:

Updated: 9/24/2023 4:21:03 AM

Geodatalov status

Evaluation criteria

ASSESSMENT POINT
STATUS VALUE
COMMENT
Metadata
good
Product spesification
good
SOSI requirement status
useable
GML requirement status
useable
WMS status
deficient
WFS status
notset
ATOM feed status
good
Nedlastingskrav status
good
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