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A closed trace with arrows pointing outward all round.
Also known as: Dome structure symbol, Structural high symbol
On a geological map a dome is drawn as a closed axial trace with arrows pointing outward in every direction, marking strata arched upward in all directions from a centre.
Marks strata arched upward in all directions from a central point.
Contexts: Maps
Is an anticline closed in every direction rather than extended along an axis, and traps hydrocarbons for the same reason an anticline does.
Contexts: Maps
A roughly circular closed line with short arrows around it all pointing away from the enclosed centre.