Question by bbb: What does the presence of angular fragments in a detrital sedimentary rock suggest about the transportatio?
What does the presence of angular fragments in a detrital sedimentary rock suggest about the transportation of the particles?
Thank you.
Best answer:
Answer by Chris
That is hasn’t travelled far from its source before being incorporated into the rock: typical for some volcanic derived and glacial sediments.
Know better? Leave your own answer in the comments!
That it’s been part of a process coming from a rocky outcropping with alot of high water speed or snow-melt and it has traveled downstream and is still on a downgrade and traveling. Most sharp detrital rock found in basins tend to be cobbles which are already rounded due to having been tumbled and rounded off by the speed of the water, once they get round, they stay pretty much in place….when you find a stream with low water but a high waterline and sharp detrital evidence in it, it’s a pretty good chance that this stream is a “melt-water” bed or flood water bed and you’re near a rocky cliffline and you’re down stream and you’re gonna be walkin uphill.
The source must be fairly close, or the edges would be worn smooth.
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I hope this is helpful.