Trilobite
Ordovician trilobitea cast of a trilobite
The Ordovician mudstone in northeastern Alabama is laced with marine fossils. Glaciers and sea have removed most of the layers above it - the next layer up is Pleistocene and above that Cenozoic. The rock preserves details, but is very soft. This one, for example broke up when I tried to lift it. But next spring this will be covered in water and lost anyway.
There are fragments of two more trilobites. One in the crack just to the left of the big one and another at the end.
The ant in the lower right is for scale. Insects and other arthropods had more adaptable body plans are are still here.
Keywords:
Alabama,
cast,
fossil,
mudstone,
photographic techniques,
photography,
pictures,
trilobite
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© Robert Harrison, Photography