We discuss the Cenozoic history of the Central Costa Rica forearc, between 10° and 9°30′N, based on geological mapping, fault slip data and seismological records.The temporal variability in the regional stress-field suggests a variable and complex deformation pattern. The first stage of deformation, from the Paleogene to early Miocene, was controlled by an extensional regime in the forearc. Afterwards, a change to orthogonal convergence triggered a contractional deformation and subsequent inversion of the sedimentary extensional basins in the middle-upper Miocene. Finally, a transpressive regime has been developed since the Pliocene.

中文翻译：

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在古近纪到现在之间，哥斯达黎加中部前臂的构造方式发生变化：结构分析和震源机制的见解

基于地质图，断层滑动数据和地震记录，我们讨论了哥斯达黎加中部前臂在10°至9°30′N之间的新生代历史。区域应力场的时间变化表明存在可变且复杂的变形模式。从古近纪到中新世早期的变形的第一阶段是由前臂的伸展带控制的。此后，正交收敛的变化引发了中新世中上层沉积伸展盆地的收缩变形和随后的反转。最后，自上新世以来已​​经建立了一种超压机制。