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I found this layered rock on a beach, what do you think?

S

stratifiedroro

New member
Hi all, I just joined to get some info on this rock I found. It is stratified layers and showcases many layers of various thicknesses and materials. If there is a name given to rocks of this type please let me know so I can do further research. Thus far I haven't been able to find a similar specimen on google but again that is most likely my lack of proper search terms. Any Info would be greatly appreciated! I am especially interested in knowing if this rock would be worth anything.

Thanks!
 
Looks like banded gneiss. The surface is smooth because it's been polished by beach action. If a broken surface has a grainy texture, it's gneiss. Otherwise it's something else.
http://www.gettyimages.com/detail/photo/banded-gneiss-rock-high-res-stock-photography/565058911.
 
Thanks for the reply Dave J, after looking at the images in the link you posted, i believe this rock to be something different. As I have learned after viewing the link, I have gneiss and shist on the beach where I found this one and this one is appears to be something different.
 
It's not unusual for gneiss and schist to be associated in a metamorphic complex. Your rock is obviously not schist. However I suspect that it is gneiss, and that what you are referring to as "layers of a variety of rock types" is actually banding of different concentrations of mineral types.
https://en.wikipedia.org/wiki/Gneiss
 
I think it's layered shale, mudstone, and sandstone. Hard to guess without getting my hands on it. Are there primarily sedimentary rocks in the region you found it in?
 
Dave J. said:
It's not unusual for gneiss and schist to be associated in a metamorphic complex. Your rock is obviously not schist. However I suspect that it is gneiss, and that what you are referring to as "layers of a variety of rock types" is actually banding of different concentrations of mineral types.
https://en.wikipedia.org/wiki/Gneiss
Click to expand...

What Dave J. said.
 
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