Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: About 33 mm across

Photo title: Brachiopod

Taxa present: Mucrospirifer sp

View full record

Submitted on 2014-10-04 by Michael Lask

Location (approximate): Toledo, Lucas, OH

Strat unit: Silica formation

Submitter notes: 71 mm along the curve, this was collected from the Seaway Quarry (near the Toledo Airport) during the spring of 2012 by Dan Edmondson. He also prepared it.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

View full record

Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: 18 mm from the top of the arms to the bottom of the calyx. Collected and prepared by Patricia Rutkowski.

Photo title: Crinoid

Taxa present: Gilbertsocrinus ohioensis

View full record

Submitted on 2014-10-04 by Michael Lask

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: About 240 mm across, this roughly 15 pound tree stump was collected b Patricia Rutkowski from the Antrim Shale of the Paxton Quarry. Callixylon Newberryi is a primitive conifer that dates back to the late Devonian Period, which is considered the time period when trees first evolved. The Callixylon is a member of the extinct order of tree like plants named Archaeopteridales. These plants with fern like leaves are estimated to be 350 to 375 Million years old making them among the worlds oldest trees. These tree like plants had leaves similar to ferns. For many years scientists classified Archaeopteris as a separate genus than Callixylonin under the order of Archaeopteridales. In the 1960s, paleontologists were able to demonstrate that the fossil wood known as Callixylon and the petrified fern leaf imprints known as Archaeopteris were actually part of the same plant. This plant no matter what it is called has turned out to be the link between trees and ferns.

Photo title: Plant

Taxa present: Callixylon newberryi

View full record

Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: 120 mm across

Photo title: Fish

Taxa present: Protitanichthys sp.

View full record

Submitted on 2014-10-04 by Michael Lask

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: Collected by Patricia Rutkowski from the Antrim Shale of the Paxton Quarry, the specimen is 303 mm long. Callixylon Newberryi is a primitive conifer that dates back to the late Devonian Period, which is considered the time period when trees first evolved. The Callixylon is a member of the extinct order of tree like plants named Archaeopteridales. These plants with fern like leaves are estimated to be 350 to 375 Million years old making them among the worlds oldest trees. These tree like plants had leaves similar to ferns. For many years scientists classified Archaeopteris as a separate genus than Callixylonin under the order of Archaeopteridales. In the 1960s, paleontologists were able to demonstrate that the fossil wood known as Callixylon and the petrified fern leaf imprints known as Archaeopteris were actually part of the same plant. This plant no matter what it is called has turned out to be the link between trees and ferns.

Photo title: Plant

Taxa present: Callixylon newberryi

View full record

Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: 61 mm long. Collected by Mike Palescuk in 2013. Prepared by Dan Edmondson. Bottom right image is the unprepared part and counter-part. Negative on the bottom.

Photo title: Trilobite

Taxa present: Eldredgeops crassituberculata

View full record

Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: Picture 2 featuring a close-up of the crown.

Photo title: Crinoid

Taxa present: Decadocrinus hughwingi

View full record

Submitted on 2014-10-04 by Michael Lask

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: 134 mm from bottom of the stem to the top of the arms. Collected by Pat Rutkowski. Picture 1 features the entire plate.

Photo title: Crinoid

Taxa present: Decadocrinus hughwingi

View full record

Submitted on 2014-10-03 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This large Brachiopod is encrusted with Aulopora microbuccinata which has grown over the lip of the Brachiopod meaning it was probably dead. The brachiopod is 6.1 cm wide by 4.1 cm long and 4.4 cm deep. This is heavily piritized as are many of the Sylvania fossils.

Photo title: Coral on Brachiopod

Taxa present: Aulopora microbuccinata

View full record

Submitted on 2014-10-02 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: Two different sizes of the same species. The larger is in the previous photo, the small one is 3 cm thick by 5. cm wide.

Photo title: Big and small Megistocrinus nodosus

Taxa present: Megistocrinus nodosus

View full record

Submitted on 2014-10-02 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This is a side view of the previous Brachiopod.

Photo title: Another view

Taxa present: Paraspirifer bownockeri

View full record

Submitted on 2014-10-02 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This is a different brachiopod from the same location also encrusted with Aulopora microbuccianata. It also show a small hole in the shell that looks like a snail boring. This Brachiopod is 7. cm wide, 4.6 cm long and 4.3 cm thick.

Photo title: Another Brachiopod with corals

Taxa present: Paraspirifer bownockeri

View full record

Submitted on 2014-10-02 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: These inarticulates, the largest being Petrocrania hamiltonae, and 1.5 cm, are out of the way at the back of the big Megastrophia. The tiny ones are .76 mm and are in the Philhedra family but they may be stewerti or crenistriata sp., it is hard to tell.

Photo title: Multiple Inarticulates hiding out on the hinge line.

Taxa present: Megastrophia concavus

View full record

Submitted on 2014-10-02 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: A nice big articulate brachiopod that is 5.4 cm wide and 4.6 cm long. Just visible on the hinge line is an inarticulate brachiopod shown in the next picture.

Photo title: Large Brachiopod

Taxa present: Megastrophia concava

View full record

Submitted on 2014-10-02 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This is the brachial (top) valve with an intact Petrocrania hamiltonae snugly in place. It is unusual to have inarticulates on both valves of a brachiopod.

Photo title: The other side of the previous brachiopod

Taxa present: Strophodonta demissa

View full record

Submitted on 2014-10-02 by David Thompson

Location (approximate): Milan, Washtenaw, MI

Strat unit: Silica formation

Submitter notes: This small Brachiopod has two inarticulates. This is the ventral (bottom) side with the scar of a Petrocrania species showing.

Photo title: Strophodonta brachiopod with two inarticulates!

Taxa present: Strophodonta demissa

View full record

Submitted on 2014-10-02 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Alpena formation

Submitter notes: This is a nice crown with the calyx 3.8 cm wide and 2.8 cm deep. The overall crown is 8.1 cm long with nice arm definition

Photo title: Crinoid crown

Taxa present: Pithocrinus cooperi

View full record

Submitted on 2014-10-02 by David Thompson

Location (approximate): Alpena, Alpena, MI

Strat unit: Thunder Bay formation

Submitter notes: This Megistocrinus shows some wear and tear with a number of nodes damaged. It is 3 cm thick by 5. cm wide.

Photo title: Crinoid calyx

Taxa present: Megistocrinus nodosus

View full record

Submitted on 2014-10-02 by David Thompson

Location (approximate): Sylvania, Lucas, OH

Strat unit: Silica formation

Submitter notes: This different view shows the inarticulate a bit better. see previous entry for sizes.

Photo title: Another view.

Taxa present: Paraspirifer bownockeri

View full record