Fossil found

[Edgychris]

Any info on this fossil would be much appreciated. Find colonial stuff, points of course, and now some fossils. I know my be appropriate thread, but you bunch of guys are very knowledgeable and help me a lot on my finds. More points to come later this week I hope. Work work work for now...

 

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[Tdog]

You've got a fossil there too but you should post it in the fossil forum and not here.

 

[Charl]

Yeah, this can be moved to the fossil forum by a moderator. In the meantime:

The first is possibly a branchlet of Calamites, one of the taller, and most common plants of the Upper Carboniferous Period.

In the second photo, out of focus, but at the bottom is a pinnule of Sphenophyllum sp., one of the types of leafs of Calamites.

You can see examples here:

https://steurh.home.xs4all.nl/engsphen/esphenop.html


Both rocks, or if it's one rock, are shale from the Rhode Island Formation, which dates to the Upper Carboniferous, or Pennsylvanian Period, as it's often referred to in the United States. It was the age of swamps that produced most of the coal in the eastern US. Including in the RI Formation coal beds. The fossils are roughly 300 million years old. The Rhode Island Formation underlays the Narragansett Basin, which includes, but is much larger in scope, than Narragansett Bay, and these fossils, as well as footprint and insect fossils, are found throughout the basin. The second photo may show part of a fern, too out of focus for me to ID...

 

[Charl]

Map of the Narragansett Basin, with geologic formations and age sequence to the right. Note position of the Rhode Island Formation, where most of the fossils in this sequence are found, near the top, roughly 300 million....

 

[Trezurehunter]

The one on the left looks like a piece of petrified wood fossil, and the one on the right looks like a fern leaf fossil.

 

[Charl]

The one on the left looks like a piece of petrified wood fossil, and the one on the right looks like a fern leaf fossil.

There are no formations in Ma. that contain petrified wood....