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Found 6 results

  1. Trigonocarpus3a.jpg

    From the album Carboniferous Plant Fossils in My Collection

    This is another large Trigonocarpus from St. Clair, which is contained intact in the shale substrate. The entire seed is visible.
  2. Trigonocarpus3b.jpg

    From the album Carboniferous Plant Fossils in My Collection

    This is another view of the same Trigonocarpus, this view showing the open end of the seed. Seeds of seed ferns - this was probably from Medullosa - had open ends to allow pollen to enter. It is thought they were fertilized by pollen when they dropped into the water although a few paleobiologists believe insects may have pollinated them through the opening. Also why were the seeds encased in a fruit like covering (like avocados)? To be consumed by creatures that lived in the shallow swamp water?
  3. From the album Carboniferous Plant Fossils in My Collection

    This Trigonocarpus fossil from St. Clair is an exceedingly rare pairing that includes the compression (fossil) and impression (cast) in matching pieces. If you look very closely you can see there is a short stem connecting the seed to the Alethopteris stem. Finding these connected is VERY rare. Also, if you look closely you can see some sort of structure revealed in the very center of the seed.
  4. From the album Carboniferous Plant Fossils in My Collection

    This 2 inch Trigonocarpus is a seed of a Medullosa (pteridosperms seed plants) which grew in shallow swamps abour 306-308 million years ago when St. Clair, PA was located near the Equator. Leaves associated with this seed & tree include Alethopteris and Neuropteris. It is thought that these seeds were encased in fleshy "fruit" like an avocado. The seeds were open at the pointed end to allow pollen to enter when the seeds dropped into the water in the shallow swamps where these trees grew. These were the largest Carboniferous seeds, growing up to 4 inches.
  5. Acorn?

    I found this in a box at a thrift store. Any idea if it’s s fossil ?
  6. Last year i collected the following Late Cretaceous Campanian specimens from a lignite layer in Henderson co., TN that has proven itself to be special to me. This is my first and only whole cone....what a sweet lil'baby! Was thinkng A sequoia species, but lets see what the experts say, I treated it w/ a preservative because i had to, the lignite was partially replaced w/ marcasite which would have soon deteoriated if left untreated. The seed & seed pod i'm not sure go together, but the seed sure looks like it may fit in something like that....the seed also stunningly looks like a redwood seed.... what is your take on these excellently preserved items?
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