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Public-images-osm logo.svg geological = moraine
Moraine de la Visaille.jpg
Any accumulation of unconsolidated rock debris previously carried by a glacier Edit this description in the wiki page. Edit this description in the data item.
Group: natural
Used on these elements
may be used on nodesmay be used on waysmay be used on areas (and multipolygon relations)should not be used on relations (except multipolygon relations)
Status: in use

geological=moraine is used to map accumulations of unconsolidated rock debris previously carried by a glacier - commonly called a  moraine. The tag is predominantly used for mapping young, not or only sparsely vegetated moraines formed by current or recent glaciers and not commonly to map older ice age moraines.

How to map

You can either draw a way along the ridge of a moraine and tag it geological=moraine or draw a closed way around the extent of the moraine (or use Relation:multipolygon for more complex shapes) with the same tag.

The tag is used both for off-glacier as well as on-glacier moraines. For undisturbed off-glacier lateral or terminal moraines the tag is frequently combined with natural=scree. For on-glacier medial moraines this should not be used because of the ambiguity of natural=scree over natural=glacier. Instead the tag surface=scree has been used in some cases, for example in the ADD import. See also glacier:part=moraine.


See also