State by State
- Specimen Number
Cut block of coarse-grained, possibly oolitic limestone. Classified as a grainstone, defined as a non-muddy, clast-supported sandstone consisting limestone (calcite/arragonite) grains, Pore spaces filled by light-colored lime cement. Massive and uniform in appearance. Fizzes with weak acid.
Sedimentary. Limestone. Grainstone.
- Location & Occurrence
Likely from northern Arkansas, a suggestion by state survey staff. Paleoenvironment of tropical-subtropical shallow seas on edge of carbonate bank with strong wave action.
- Geological Age
Such uniform limestones are commonly quarried for dimension stone because the rock is fairly soft and easily cut into the desired shape. The stone crumbles in a carbonized atmosphere.
See separate list for acknowledgements.