DescriptionFINE POSITIVE/NEGATIVE DRAGONFLY
Jurassic, Tithonian stage
Solnhofen Formation, Eichsätt, Bavaria, Germany
The fine-grained lithographic limestone of Solnhofen is renowned for the exquisite state of preservation observed in its abundant fossils of the late Jurassic, 145-150 million years ago. The present specimen shows beautiful definition in the remains of an ancient Dragonfly, but most impressive is that it has been preserved in the rare form of a positive and negative fossil. Geological conditions must be just right for this to occur, the initial fossilization and the formation of the rock's strata. A slab was here split in two to reveal not only the fossilized body of delicate, elegant Dragonfly, but also a cast of the body, the negative impression. A rare occurrence in its own right, the slabs are further enhanced by the characterful shape of the insect, with a well-defined 4⅞-inch wingspan, the body distinctively curving, and two of its jointed legs distinctly held forwards either side of the head. Each fossil measures 3 inches long, in a soft beige color, harmonious with the creamy limestone plaques, each 12 inches long.
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