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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Geology (GG)
Which of the following is only flow axis indicator?
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Sajan sarthak Best Answer
Flow axis indicators are structures that provide information about the axis of the current but do not differentiate between upstream and downstream directions. They are nevertheless useful in combination with unidirectional indicators, for example, grooves and flutes may be associated with turbidites.
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Primary current lineations on bedding planes are measured by determining the orientation of the lines of grains. Groove casts are elongate scours caused by the indentation of a particle carried within a flow that give the flow axis. Elongate clast orientation may provide information if needle-like minerals, elongate fossils such as belemnites, or pieces of wood show a parallel alignment in the flow. Channel and scour margins can be used as indicators because the cut bank of a channel lies parallel to the direction of flow. These are few flow axis indicators
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Rahul kumar![best-answer]()
Groove casts serve only as flow axes indicator.