Unusual beach pebbles markings resembling a map found in Cyprus

[MonkiMu]

I found this stone in the southern shore of Cyprus. It has very unusual markings. I was wondering if anyone has seen they markings before and could maybe explain how they are formed.

 

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[Crow]

I found this stone in the southern shore of Cyprus. It has very unusual markings. I was wondering if anyone has seen they markings before and could maybe explain how they are formed.
View attachment 2128373

I can only guess one time the rock was alluvial mud from eroded chalk that has worn down mixed with organic materials and turned back into stone again over millions of year. Wave action has rounded the stone.

It looks like Marly chalk with bands and modules Known as Leftkara from the Palaeogene period. There is three period with in that period. But I am not sure which? Its not unusual to find fossils in that type of chalk.

If I was to guess where you found it on the beach? My guess would be at or near Pissouri bay near cape Aspero?

Crow

 

[Gulf Coast Pirate]

Possibly howlite?

 

[Crow]

Look similar but in context of where the stone was found in Cyprus. I was working off the geological map.

Cyrus geological map

Crow

 

[MonkiMu]

I can only guess one time the rock was alluvial mud from eroded chalk that has worn down mixed with organic materials and turned back into stone again over millions of year. Wave action has rounded the stone.

It looks like Marly chalk with bands and modules Known as Leftkara from the Palaeogene period. There is three period with in that period. But I am not sure which? Its not unusual to find fossils in that type of chalk.

If I was to guess where you found it on the beach? My guess would be at or near Pissouri bay near cape Aspero?

View attachment 2128418

Crow

Thank you so much so explaining to me. You are exactly right - it's from Pissouri bay!

 

[pickaway]

Neat looking rock, I wouldve taken it home...

 

[Crow]

Thank you so much so explaining to me. You are exactly right - it's from Pissouri bay!

Actually I thank you!

As it helps me sharpen my research skills. They are rather rusty these days. Thanks for feed back. there was only two spots on coast with Marly Chalk and Pissouri bay was main one with beach.

Crow

 

[Digger RJ]

I found this stone in the southern shore of Cyprus. It has very unusual markings. I was wondering if anyone has seen they markings before and could maybe explain how they are formed.
View attachment 2128373

Nice!!! Congrats!!!

 

[Red-Coat]

Neat rock. Those look like secondary sedimentary structures formed by mineral precipitation in a fracture which have been subsequently smoothed by water tumbling. Some people call them ‘Liesegang’ bands but, strictly speaking, this refers only to structures with a concentric ring-like appearance although they all form in a similar way. Differential erosion can give them a 'relief' pattern where the lines and rings stand proud of the matrix. They’re relatively common features in sedimentary rocks, especially sandstone which is rich in iron oxides (but not exclusively so). When found in large exposures, it’s sometimes called ‘carpet rock’.

Here’s an example of Liesagangs in sandstone where the ring structures are constrained by those in linear fractures. You won’t always find both types together.

[pic from Richard Childs’ ‘onlandscape.co.uk’]

 

[Coinstar magnet]

I found this stone in the southern shore of Cyprus. It has very unusual markings. I was wondering if anyone has seen they markings before and could maybe explain how they are formed.
View attachment 2128373

That is a very nice find.. that's a keeper....one of the things I miss being here on the east coast are the agates, volcanic and unusual rocks that are in abundance in the Pacific NW.... I've only been here alittle over a year now so it may be that I haven't looked in the right places...

 

[Coinstar magnet]

Neat rock. Those look like secondary sedimentary structures formed by mineral precipitation in a fracture which have been subsequently smoothed by water tumbling. Some people call them ‘Liesegang’ bands but, strictly speaking, this refers only to structures with a concentric ring-like appearance although they all form in a similar way. Differential erosion can give them a 'relief' pattern where the lines and rings stand proud of the matrix. They’re relatively common features in sedimentary rocks, especially sandstone which is rich in iron oxides (but not exclusively so). When found in large exposures, it’s sometimes called ‘carpet rock’.

Here’s an example of Liesagangs in sandstone where the ring structures are constrained by those in linear fractures. You won’t always find both types together.

View attachment 2128529
[pic from Richard Childs’ ‘onlandscape.co.uk’]

Nice example!

 

[MonkiMu]

Neat rock. Those look like secondary sedimentary structures formed by mineral precipitation in a fracture which have been subsequently smoothed by water tumbling. Some people call them ‘Liesegang’ bands but, strictly speaking, this refers only to structures with a concentric ring-like appearance although they all form in a similar way. Differential erosion can give them a 'relief' pattern where the lines and rings stand proud of the matrix. They’re relatively common features in sedimentary rocks, especially sandstone which is rich in iron oxides (but not exclusively so). When found in large exposures, it’s sometimes called ‘carpet rock’.

Here’s an example of Liesagangs in sandstone where the ring structures are constrained by those in linear fractures. You won’t always find both types together.

View attachment 2128529
[pic from Richard Childs’ ‘onlandscape.co.uk’]

Thank you. This is fascinating to me and has given me a lot to learn from about the rock patterns.

 

[E-Trac-Ohio]

A very interesting looking stone !

 

[oldmxrat]

That's a really nice specimen, thanks for posting!