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Showing results for tags 'potomac group'.
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Weather was really good today so I went out hiking near my home and picked some rocks/fossils up on the way. I was along a stream the entire time, and the stream exposed sediments from the Potomac Formation, a Cretaceous deposit that has some plants and reptilian stuff in it, as well as Piedmont schist. Top down I think it's a bone fragment (?), bone/tooth/plant (?), plant, and silicified wood (??). Some of the stuff is still covered in dirt, so sorry if i's not clean/covered in mica flakes (there's a lot of that around here.)
Flora from Md
Baddadcp posted a topic in Fossil IDAnother flora object with unique structure.
Nut or bivalve?
Baddadcp posted a topic in Fossil IDI am going to leave this right here without comment. Prince George's County Md creek find.
Petrified Wood Find
EMP posted a topic in Member CollectionsI found this nice petrified wood specimen while collecting in the early Cretaceous Potomac Group sediments in Washington DC recently. It is pretty well preserved for this unit, with nice surface features, knots, and growth lines present on it.
EMP posted a topic in Fossil IDI found this specimen recently and have been perplexed by it for a while. To me it appears to be a tooth, though if it were I don't know from what. I looked at it from under my loop and it does have some small dimples in it, and is made of shiny black material, which is what drew me to that possibility in the first place. It looks similar to teeth I've seen posted on the forum before, especially in the Pennsylvanian shark tooth topics. I did some searching and oddly enough ended up finding images from a ptychotrygon. I don't know what it is exactly, but form the images it has a resemblance to