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Showing results for tags 'holdfast'.
Found 11 results
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A rangeomorph holdfast trace fossil from the Ediacara formation, Rawnsley quartzite of the Flinders Range, South Australia. This specimen is Medusina mawsoni, so called because it was until recently thought to be a jellyfish, but is now believed to be the attachment point of a fractal rangeomorph as Charniodiscus is the point of anchorage for Charnia sp. This one may have been the holdfast point for some species of Rangea. The diameter of the outer circle is 1.5 cm and the fossil is estimated to be 555 million years old.
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- achlysopsis
- acorn worm
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This is a holdfast of a particular seaweed (not giant kelp) and is found in California
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Hello, I wanted to ask for help identifying these crinoid fossils from Dudley of UK. They are all quite small (UK penny is 2cm across) and I think mostly partials. 1. Just a partial calyx I think, the section around the base where the stem attaches 2. I can't really tell if these are three arms or three stems, and if the former they may not be attached to a calyx. 3. 4. Another small partial loose calyx? 5. Seems like a partial holdfast 6. 7. Same genus/species as #3 maybe? Has some odd holes 8. Thank you.
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Hello, I believe this to be a "holdfast" from the Crawfordsville Indiana crinoid locality. I am hoping that someone could help with identification of the particular species, and also if there is a scientific name for "holdfast." Thank you!
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I enjoyed an autumn drive through the rusty-red-colored oak forests that blanket the scenic mountains of northeast West Virginia. Two inactive quarries enticed me to prospect a bit. In the first quarry of Ordovician age shaly limestone was this graptolites plate .... perhaps Climacograptus? In the second quarry of early Devonian age massive limestone was this crinoid column base with the attached holdfast. Both specimen photos are as found.
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Have you ever wondered what the holdfast root system looked like? I did. So I prepped one of my least costly duplicates to see the whole picture. Here are the before photos.
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From the album: Other Fossils
Another holdfast from the Maquoketa formation. -
From the album: Other Fossils
This is a crinoid holdfast attached to a cephalopod. There are a couple more smaller ones to the upper right of the large one. -
From the album: Other Fossils
These are multiple crinoid holdfasts on what was once a cephalopod. -
From the album: Other Fossils
This is a crinoid holdfast from the Prosser member of the Galena formation of Southeast Minnesota. -
From the album: Other Fossils
This is a crinoid holdfast from the Galena Group of Southeast Minnesota.
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