EAS210 Lecture Notes - Lecture 9: Triaxial Shear Test, Core Sample, San Andreas Fault
30 Nov 2018
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Of the two possibilities for strike, 180 apart, we choose the one according to the right hand rule: such that if we face in that direction, the plane dips or descends to the right. Chapter 9, p. 211-215 earth: an introduction to physical geology 4ce. Given the right combination of conditions, rocks will deform in a ductile or. Eas 210 plastic manner to produce folds: terminology. Rigourously defined: rocks in the centre/core of the structure are youngest, and get symmetrically older moving outward a few more terms: The fold axis is the line which, moved parallel to itself in space, generates/traces the folded surface. The hinge line is the line of maximum/tightest curvature on the folded surface. Horizontal fold axis and hinge lines the pattern described: is parallel outcrop bands of uniform width, with a mirror-image or reflected pattern about the centre of the fold, whose age determines the type: plunging fold.
