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Compaction Band Spacing - Bed Thickness Scaling | |||||||
Compaction band spacing shows a significant variation from a few millimeters to several meters. For example, Figure 1 shows a rather narrow spacing on the order of a few millimeters or centimeters across thin beds or sequence of thin beds of Aztec sandstone outcropping out near the Willow Tank locality at Valley of Fire State Park, Nevada (see 'Fractures in Valley of Fire, Nevada, USA' under case studies for the location). Analogous to the joint spacing-bed thickness relationship of the bed-confined joints (see the link for 'Joint Spacing - Layer Thickness Scaling' and 'Mechanisms and Mechanics of Joint Sets') roughly a similar ratio appears to exist for the compaction bands and the cross beds or in some cases amalgamated sequence of cross beds as seen in the photograph of a steep erosional surface in Figure 2. Click on the image to enlarge it so that it will be easier to observe bed-bounded compaction bands and their spacing. | |||||||
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