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That banding is very special. Somewhere out there there must be a science nut that specialises in Chert / Flint. Since all Flint was originally a living organic entity, what portion of the creature was such design possible?
And the color, was it just mineralisation or partly some hue of the original creature ??
Frio does looks closer than Mark but a hint of Martindale might justify a professional opinion at a flint show.
Pretty good size for whatever, very nice
"All flint was once a living organic entity ?"
Very cool material. I am with SH, it has a Martindale look to it.
Lots of good info with simple Google search..try; COLOR OF FLINT ROCK.
Color is imparted by the nature of the surrounding sediments. Black to dark is organic coloring, red > brown > yellow, variations of iron oxide.
"clarity" is basically a function of the fineness and density of the crystaline structure. So those magnificent Nueces valley translucents are a high grade flint with just a touch of iron oxide.
Related info;; In pure geology speak, all flint is Chert...but not all Chert is flint . . . . . . Real chert is generally course and dull. Flint is shiney.
Aside from sponges, another large flint variety is DIATOMS...very small micro creatures that were swept into huge flat deposits by wave action.
For those few that are really interested in this subject....there is exactly just such a structure right at the C3 Camp 13...
When Richard dug the "test trench" that is now a major producing area, he dug far up hill....No body bothers with this area now as its poor habitation material but...at about the 2 foot down level is this sheet flint. Just look at the pieces in the throw dirt.
Flint ridge Ohio is very special....said to be 98.93 silicon dioxide. ( very high level of pure creature )
No word on banding yet
Thanks for all the great information. I just hope after I have been digging for 30+ yrs I know half as much as you do my friend,