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Compaction Band Length

Data on the length distribution for compaction bands are rare. Sternlof (2006) mapped traces of high-angle to bedding compaction bands in Aztec Sandstone exposed within Valley of Fire State Park, Nevada, using low altitude aerial photographs. Sternlof reported a range of lengths from a few meters (the lower end of the mapping resolution) to about 100 meters (Figure 1).

Compaction band trace map in Aztec Sandstone exposed at Valley of Fire State Park, Nevada. Inset showing details of the relationships among neighboring bands. From Sternlof et al. (2006).Figure 1. Compaction band trace map in Aztec Sandstone exposed at Valley of Fire State Park, Nevada. Inset showing details of the relationships among neighboring bands. From Sternlof et al. (2006).

More detailed length data using ground measurements for the compaction bands with various orientation with respect to the bedding and horizontal plane have been documented by Deng and Aydin (2012) and Torabi et al. (2015) which shows much shorter trace lengths due to gaps between various compaction band domains. Figures 2(a) and 2(b) from the former show length-frequency distribution for compaction bands at high-angle to bedding (a) and compaction bands parallel to bedding (b). Figure 3 from the latter shows data with similar results from various locations within the park. As described somewhere else, compaction band domains (see the links below) show highly variable sizes and variable sets so that significant spread in the individual band lengths may be expected.

Frequency-length plots of compaction bands at high-angle to bedding (a) and parallel to bedding (b) in Aztec Sandstone exposed in Valley of Fire State Park, Nevada. The individual bands are remarkably short. From Deng and Aydin (2012).Figure 2. Frequency-length plots of compaction bands at high-angle to bedding (a) and parallel to bedding (b) in Aztec Sandstone exposed in Valley of Fire State Park, Nevada. The individual bands are remarkably short. From Deng and Aydin (2012).
Length plots of dominant and secondary compaction band sets at high-angle to bedding at various locations within the central part of Valley of Fire State Park, Nevada. From Torabi et al. (2015).Figure 3. Length plots of dominant and secondary compaction band sets at high-angle to bedding at various locations within the central part of Valley of Fire State Park, Nevada. From Torabi et al. (2015).
Reference:

Deng, S., Aydin, A., 2012. Distribution of compaction bands in 3D in an aeolian sandstone: The role of cross-bed orientation. Tectonophysics 574–575: 204–218. http://dx.doi.org/10.1016/j.tecto.2012.08.037.

Sternlof, K.R., 2006. Structural geology, propagation mechanics and hydraulic effects of compaction bands in sandstone. Ph.D. Dissertation, Stanford University.

Torabi, A., Aydin, A., Cilona, A., Jarsto, B.E., Deng, S., 2015. The dynamics and interaction of compaction bands in Valley of Fire State Park, Nevada (USA): Implications for their growth, evolution, and geostatistical property. Tectonophysics 657: 113-128. http://dx.doi.org/10.1016/j.tecto.2015.06.029.



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