in the interest of science got brutal and attacked this specimen! Very brittle and quite crumbly.
In the absence of a microscope have taken a couple more pics using a magnifying glass with my iPad to show a BIT more detail. Does this help at all....?
Hi Tabfish, i don't THINK its cement.
To give a bit more info if its any help, its quite lightweight and rough chalky textured (so yes, a bit cement-like). The bits I've found have always been sort of encrusting around a shell or small stone or a bit of fossil turtle shell or similar. Any other thoughts?
I think this looks rather industrial - sintered fly ash, perhaps.
This text is too technical, but it includes some micrographs
- "Physical characteristics of sintered fly ash aggregate containing clay binders"
Sintered fly ash is used, for instance, in some concretes, as evidenced by
- "Durability aspect of concretes composed of cold bonded and sintered fly ash lightweight aggregates"
We love the I.W for fishing and fossils,
I recently found this specimen at Kilnsea on the Holderness coast - East Yorkshire.