GeologyRocks

 Nummulites are fossils, in fact they are foraminifera (the calcareous exoskeletons which makes up chalk).  They are classed as protozoa, and I believe they are made up of single celled organisms.

They range from microscopic to several inches and are generally a sort of spiral shape, but often not a regular spiral.  

A researcher called Lorraine Casazza has done a lot of work on Egyptian nummulites.  I think she is at University of California.  Suggest you try to Google that.  She will obviously be far more informative than me.

I have only ever seen then in Northern Spain. 

John

“Civilisation exists by geological consent, subject to change without notice.” -  Will Durant

So basically in small words, they are the exoskeleton of Single celled Eukorayotic cells, so they're actually fossils from a recent period ?

 These are pictures of the ones i saw it during my geology section, i'd need a microscope to see it right?

As I said some are microns across and others up to inches across.  I haven't seen the same ones as you.

John

“Civilisation exists by geological consent, subject to change without notice.” -  Will Durant

I saw massive beds of these in Libya, absolutely full of oil. The ones I saw looked superficilaly like ammonites and every single chamber of these disc shaped microfossils was full of oil. Amazing.

Apparently the pyramids are made of em...

I think the pyramids being made of them is perhaps erring on the side of  stretching the truth.  The pyramids are limestone blocks with nummulites in some of the blocks.

Indeed, it was pointed out by Ian Stuart last night in Rise of the Continents on BBC 2

John

“Civilisation exists by geological consent, subject to change without notice.” -  Will Durant

Yes i read about that, apprently the limestone blocks that were used to make the pyramids contained them, but what do they fossilize?

bacteria?  

It's in my post (reply to you!) on 8th May.

John

“Civilisation exists by geological consent, subject to change without notice.” -  Will Durant

Is it Iain Stuart or Iain Stewart?

 Yes, I saw that too. What did you think of the program as a whole?

I had people at work watching it.  

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