Abstract
Foliations within a Miocene slumped bioclastic sandstone unit of the Pakhna Formation, southern Cyprus, were investigated in order to assess the importance of slump strain, liquifaction and compaction in their generation. There are two approximately orthogonal sets of folds, F 1 and F 2. F 1 folds are upright to inclined slump folds formed during slope-failure translation of the sediment. The cores of upright F 1 folds have a steeply dipping macroscopic fabric defined by the axial surfaces of small tight folds in compositional layering. F 2 folds occur on steeply-dipping limbs of F 1 folds. F 2 folds are small and asymmetric with flat-lying axial surfaces, and are interpreted as compaction generated. A pervasive flat-lying microscopic fabric defined by grain and pore long axis orientation is found in both fold sets, and is probably a liquifaction fabric enhanced by compaction. A pervasive steeply-dipping microfabric parallel to the axial planes of slump folds is not present in any of the slumps investigated.
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