taconite
The special multi-grain recipe used for making taco-shells; this unique "formula of flours" is a closely-guarded secret, just like the "how we mix it" proportions of ingredients for other famous highly-desirable (and therefore highly-profitable for their inventors who hold the patents on said delectables) concoctions like Coca Cola, Colonel Saunders' chicken-sauce, Damascus steel, etc. have always been "totally hush-hush" ever since said recipes were perfected.
Ground-up grain is hardly very far up on the atomic weights & measures scale, so I am at a loss to understand why the Edmund Fitzgerald sank just from having her hold filled with "taconite", even if they did indeed "heap her to da brim" with it.
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