🔎 UNIDENTIFIED Is this rock a sedimentary rock or metamorphic?

[rockpassion]

Is this rock a sedimentary rock or metamorphic? It doesn't scratch glass and has alot of clear veining with crystals throughout it. and sugar like Crystallization througout.

 

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[rockpassion]

after closer examenation it turns out to be a micro fossil limestone

 

[ToddsPoint]

after closer examenation it turns out to be a micro fossil limestone

Your rock is loaded with silica. I’d call it chert before I’d call it limestone. It likely formed in a limestone deposit. I can definitely see small round donut shaped fossils so you’re on the right track. Limestone that has metamorphosed is marble.

 

[rockpassion]

Your rock is loaded with silica. I’d call it chert before I’d call it limestone. It likely formed in a limestone deposit. I can definitely see small round donut shaped fossils so you’re on the right track. Limestone that has metamorphosed is marble.

oke that's interesting and strange because this is what the whole rock looks like. Is also got alot of silica veins running through it. does chert have that?

 

[ToddsPoint]

oke that's interesting and strange because this is what the whole rock looks like. Is also got alot of silica veins running through it. does chert have that?

When limestone forms at the bottom of oceans some of it has a lot of silica from Dead Sea creatures with silica shells. Diatoms are radiolaria. The silica tends to gather in nodules. Limestone with chert or flint nodules is called cherty limestone. Sometimes you find limestone with chert attached. The chert can be very pure and crack free or very spotty and only partially formed. That’s what yours kinda looks like to me.