Definition
A “Y-shaped” tectonic pattern of scarps and confined arcuate ridges and troughs that disrupts the otherwise continuous boundary scarps that separate the South Polar Terrain region from older terrains that lie northward of about 55°S of Enceladus.
Synonyms
Arcuate fold belt; Confined fold belts; Lateral fold-and-wedge structure
Description
The Y-shaped discontinuities generally occur at the cusps of intersecting, south-facing, arcuate scarps that bound the South Polar Region. Each Y-shaped tectonic pattern is defined by a pair of southward-facing scarps that bend northward as the gap between them progressively tapers to a narrow zone in which the scarps converge or become crudely parallel to each other. They transition to a narrow, subparallel N-S trending network of rifts and fracture that extend in northward as far as the equator of Enceladus. The scarps bound a wedge-shaped arrangement of parallel, curved ridges and troughs that are typically arc convex-northward...
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References
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Helfenstein, P. (2015). Y-Shaped Discontinuity. In: Hargitai, H., Kereszturi, Á. (eds) Encyclopedia of Planetary Landforms. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-3134-3_576
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DOI: https://doi.org/10.1007/978-1-4614-3134-3_576
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