Figure 7

Kinematic model with average velocities of blocks and faults. The numbers show velocities in mm/yr. In orange velocities of mainly strike-slip displacement with the sense of motion marked by the arrows. Extension and shortening rates in blue and red respectively. The white numbers and arrows show the horizontal motion of blocks. The green shaded area correspond to the North American plate, the violet shaded area corresponds to the fixed Caribbean plate, the red shaded area to the Cocos Ridge bathymetric feature and the yellow shaded area to the Central Costa Rica Deformed Belt (CCRDB). The subduction is coloured with red and blue for the sections with high and low coupling respectively. The line with opposing triangles show the sutured zip-type plate contact. The software package GMT94 (version 5.4) has been used to produce the figure.