Changes

file:dipmeters_fig5.png|{{figure number|5}}Simple dip model for the description of a normal fault with drag.

file:dipmeters_fig5.png|{{figure number|5}}Simple dip model for the description of a normal fault with drag.

file:dipmeters_fig6.png|{{figure number|6}}Model of a tilted plunging anticline as it would appear on an arrow plot.

file:dipmeters_fig6.png|{{figure number|6}}Model of a tilted plunging anticline as it would appear on an arrow plot.

file:dipmeters_fig7.png|{{figure number|7}}Field example of a detailed dip computation through a sequence of interrupted meandering stream point bars.

file:dipmeters_fig7.png|{{figure number|7}}Field example of a detailed dip computation through a sequence of interrupted meandering stream point [http://geonames.usgs.gov/apex/f?p=136:8:0::::: bars].

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===Stratigraphic applications===

===Stratigraphic applications===

For stratigraphic applications, comparisons to a set of models is also a valid interpretation approach, but in this case, very simple models do not work well. Sedimentary geology is too complex. In fact, hand-drawn models may not be valid at all. It is preferable to use independently verified field examples, such as the one shown in [[:file:dipmeters_fig7.png|Figure 7]]. In this example, the sandy sediments are made up of a sequence of interrupted, truncated, and stacked point bars deposited by meandering stream activity. Few complete fining-upward point bar cycles (gravels to sands to shales) are present. Instead, erosional cuts and festoon cross-bedding indicate the start of a new cycle that may or may not be interrupted before the deposition of low angle planar current bedding. (Additional characteristics of meandering streams are covered in  “[[Lithofacies and environmental analysis of clastic depositional systems]]”.) In the general case, a catalog of field examples of dip plots from various known depositional environments is a valuable aid to stratigraphic dipmeter interpretation.

For stratigraphic applications, comparisons to a set of models is also a valid interpretation approach, but in this case, very simple models do not work well. Sedimentary geology is too complex. In fact, hand-drawn models may not be valid at all. It is preferable to use independently verified field examples, such as the one shown in [[:file:dipmeters_fig7.png|Figure 7]]. In this example, the sandy sediments are made up of a sequence of interrupted, truncated, and stacked point [http://geonames.usgs.gov/apex/f?p=136:8:0::::: bars] deposited by meandering stream activity. Few complete fining-upward point bar cycles (gravels to sands to shales) are present. Instead, erosional cuts and festoon cross-bedding indicate the start of a new cycle that may or may not be interrupted before the deposition of low angle planar current bedding. (Additional characteristics of meandering streams are covered in  [[Lithofacies and environmental analysis of clastic depositional systems]].) In the general case, a catalog of field examples of dip plots from various known depositional environments is a valuable aid to stratigraphic dipmeter interpretation.

==See also==

==See also==