Louisville Kentucky Silurian Fossils

This first two fossil images are of the Cystiphyllum horn coral and it is a textbook specimen. I mean that literally because this one matches up well with the images on pages 96-97 Plate 6 figures 23-25 of the Cystiphyllum granilineatum. The book is Erwin Stumm's Silurian and Devonian Corals of the Falls of the Ohio from 1964. To help re-enforce the horn coral was found with a chain coral shown later in the post dating it the Silurian Period and the Louisville Limestone of Louisville Kentucky. It is nice to see the holdfasts that grew on one side of the horn to help anchor it a seafloor base.

Next two pictures are of the Silurian Periods famous index fossil... HALYSITES!  Also so known as  the chain coral with its distinctive pattern.

This last fossil is somewhat of a mystery to me.  It appears to be brachiopod imprint but I am not sure about those divot marks (maybe 7 or so) that look like spines.  Spines that size usually show up on snails so maybe they are some sort of boring marks?  This fossil was found with the others but it could be from the Devonian Period Jeffersonville Limestone.

Delaware Microfossils

Dentalina sp. foraminifera found at the Chesapeake and Delaware Canal dredgings of the Mount Laurel Formation.  Thanks to Shamalama for the material.  These fossils are of creatures that existed in Cretaceous Period.

This is some sort of bryozoan or coral growth on an enchinoid spine.

Here are some more coral or bryozoan pieces.

Mycetophilidae Fungus Gnat Fossil

Insect fossil from the Parachute Creek Member of the Green River Formation of Rio Blanco County, Colorado.  This insect was called a Mycetophilidae Fungus gnat.  This fossil was magnified 40x with a microscope.  The rest of the images on this post were done with a microscope but not sure what they are.  They all were in the same rock plate.