Türkiye Jeoloji Bülteni

Post Eocene Tectonic Development of Ankara Yahşıhan Region

Abstract: Post Eocene (probably Oligocène) Alpine paroxysm producedasymmetric folds, generally overturned eastwards. Folding was folloved byupjthrusts, thrusts and right lateral strike-slip faults. A compression couple, initiallyoriented NW-SE, is seen to rotate in time to a N-S position. AH during this timethey appear to be accompanied by a clockwise shear couple.