022520b

Undichna, a trace fossil made by a fish swimming in water so shallow that its ventral fans cut grooves in the mud. Indicates the former presence of a tide pool on a  Pennsylvanian mud flat in Walker County Alabama, 313 million years ago. Collected by Prescott Atkinson. More information here: https://www.alabamapaleosoc.org/

052319d

Dolomitized limestone (pink=calcite stained with alizarin red S; white and gray= dolomite), early dolomite formed under exposure surface at top of upward-shoaling cycle, Mississippian (Serpukhovian, Chesterian) Bangor Limestone, a few meters above a carbonate mound, near Moulton Alabama, thin-section photomicrograph,

053118b

Steven C Minkin Paleozoic Footprint site

The most important trace-fossil site of its age in the world (Pennsylvanian, Westphalian A)

Millipede trackway

Horseshoe crab trarkway 

Jumping flightless insect trarkway 

Reptilian trarkway 

Amphibian trackway

Fish-fin trace (two of them) 

Insect wing impression

These trace fossils (the impression of wings is actually a body fossil), and thousands of others,  were preserved in a 313 million year old tidal flat in central Alabama..


The site and related subjects are described in this book:

 

Which you can buy from indie bookstores

https://www.indiebound.org/book/9780817358440

Or from other places

https://www.amazon.com/Footprints-Stone-Fossil-Coal-Age-Tetrapods/dp/0817358447/ref=sr_1_1?s=books&ie=UTF8&qid=1469797628&sr=1-1&keywords=%22footprints+in+stone%22#nav-top