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Map
of fractures with color symbology according to strike (red = 000°- 020°; yellow
= 021°- 040°; green =
041°- 060°; blue
= 061°- 080°; purple
= >080°) , overlain on an aerial photomosaic of the Reykjanes
Peninsula (aerial photo from Loftmyndir ehf. Bathymetric contoursfrom
Icelandic Hydrographic Survey). In white is shown the plate boundary
axis connecting the centers of volcanic fissure swarms (outlines
redrawn from Jakobsson et al., 1978). Notice how the
plate boundary axis bends gradually as it comes onshore where it is
eventually oriented approximately 30° counterclockwise with respect
to
the direction of absolute plate motion (red arrows).
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Fractures separated according to strike,
using the color symbology above. Fractures within a specific strike
range have a distinctive spatial distribution with respect to the
volcanic fissure swarms.
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| Clifton, A.E., Kattenhorn, S.A., Fernandes, L., 2005, Structural
architecture of a highly oblique divergent plate boundary. General
Assembly of the European Geosciences Union, April 24th – 29th,
2005, Vienna, Austria. |