Sunday, January 30, 2022

Part of Bumastus Trilobite Fossil

Bumastus niagarensis (Whitfield, 1879) trilobite pygidium fossil found in the Waldron Shale of Clark County, Indiana USA. It dates to the Silurian Period (Wenlock Epoch, Sheinwoodian to Homerian Stages). Species was originally named by  R. P. (Robert Parr) Whitfield (1828-1910) as Illaenus niagarensis in the Annual Report of Geological Survey of Wisconsin for 1879, 1880 page 68.

I came across a number of these fossils in my Waldron Shale box while looking for brachiopod fossils to send off to another collector.

Sunday, January 16, 2022

Hexagonaria anna Coral Fossil

These pictures are of a Hexagonaria anna (Whitfield, 1973) coral fossil. It was found in the Bell Shale of the Traverse Group of Alpena, Michigan, USA. The coral lived in the Devonian Period. Fossil was found October 2021.

Saturday, January 15, 2022

Tree Fossil in Sandstone?

While working in the lobby at work I noticed what appears to be a tree fossil imprint in a sandstone block. The building was built over 50 years ago and the lobby has its side walls surfaced with mortared sandstone blocks that are of varying sizes and are probably about 12 cm thick. The fossil is about 8 cm long and 1 cm wide.

The imprint reminds me of upper Carboniferous lycopodiophyte Sigillaria plant or could be part of a Calamites stem.

Learn more about fossil plants from this area at the Kentucky Geological Survey web site.

Sunday, January 9, 2022

Cryptolithus tessellatus Trilobite Drawing


This image created by Doctor Elvira Wood and published in 1920 in The Appendages, Anatomy, and Relationships of Trilobites by Percy E. Raymond. It is of a Cryptolithus tessellatus (Green, 1832) trilobite. The creature lived in the Ordovician Period. This image was a restoration and not a direct drawing of an actual specimen. Trilobites like this are found in Carroll County, Kentucky.

I am not sure if an intact one has been found in Kentucky. The Cincinnati Dry Dredger's web site has a page for this trilobite showing an intact fossil.