Structural geology of rocks and regions
When author George Davis conceptualized the cover illustration for the first edition of Structural Geology of Rocks and Regions, he wanted to emphasize that the human adventure of learning comes from doing; and that new insight springs from careful, detailed examination of field relationships, viewed at all scales from rocks to regions. He asked illustrator David Fisher to combine four photos into the single painting, you see here. The geologist is enveloped by challenging structural relationships of folded rocks in outcrop; the curvature of back and neck, torqued as eyes and brain move closer and closer to clipboard, is the classic language of geologic mapping. When George Davis and new co-author Steve Reynolds contemplated the cover illustration for the second edition of Structural Geology of Rocks and Regions, they asked: "Who else is in the picture?" Stepping back, and handing David Fisher a couple of additional photos, the scene suddenly changed. The original geologist who had been sitting on the outcrop recording data is now up and walking around, gathering new data. A second geologist has moved into the new foreground, mapping and sketching a system of small-scale imbricate faults. Again, the head is torqued to handle the requirements of fine description and careful mapping. Like so many structural geologists, she seems to thrive on visualization of three-dimensional relationships.
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Nature of Structural Geology
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analysis angle angular shear atoms axial axis bedding body brittle cataclastic circle clay cake cleavage compressive confining pressure crust curved deformation mechanisms differential stress diffusion creep direction dislocation displacement distortion ductile elastic ellipse envelope failure fault surface fault zone finite strain ellipse finite stretch fluid pressure folds foliation footwall force fracture surface friction G. H. Davis Geological Society geometric grain boundaries granite horizontal kinematic lattice layers limestone lineation lithosphere load magnitude metamorphic microcracks minerals movement mylonitic normal faulting normal stress orientation original outcrop parallel permission of Geological perpendicular Photograph by G. H. plate plate tectonics porphyroclasts propagation pseudotachylite Published with permission quartz Ramsay recrystallization regional relative rock rotation sandstone sedimentary sense of shear shape shear fractures shear strain shear stress shear zone shortening simple shear slickenlines sliding specimen strain rate strata strike-slip faults Structural Geology stylolites tectonic tectonites temperature thrust faults tion transform faults veins vertical