⛏ Thomas Hammerich
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thammerich.bsky.social
⛏ Thomas Hammerich
@thammerich.bsky.social
⛏ Geologist
🎓 Lecturer / Speaker
🛳 Expedition Leader & Guide
10+ years of exploring the global geology
guiding expedition voyages on land/@sea.
🌱 Seed & plant collector, 🏃‍♂️🚴‍♂️🖖 ☕lover

If you want to know more about Crinoids - here are some details about the anatomy.

(Right picture from Wikipedia)
en.wikipedia.org/wiki/Crinoid
November 14, 2025 at 8:57 PM
Step 33:
WELL DONE - we are finished!

Hope you enjoyed building your 'Lily of the sea' ?!
November 14, 2025 at 8:55 PM
Steps 31+32:
Now the crinoid is settling onto it's own premises: the hardground to have a stable solid ground!
November 14, 2025 at 8:54 PM
Steps 29+30:
Now it looks ultimately like a crinoid! Almost done... 🤗🤗
November 14, 2025 at 8:53 PM
Steps 27+28:
Now all comes together:
Calyx, Tegmen and stem.
November 14, 2025 at 8:52 PM
Steps 25+26:
We continue with the Tegmen: folding & glueing!
November 14, 2025 at 8:50 PM
Steps 23+24:
We're getting there... Stem is finished! We continue with the Tegmen.
November 14, 2025 at 8:48 PM
Steps 21+22:
Our stem needs an outside layer around it! ...it just looks better... 😅
November 14, 2025 at 8:46 PM
Steps 19+20:
We add more holdfast for even more grip!

Crinoids love strong currents for filter feeding!
November 14, 2025 at 8:44 PM
Steps 17+18:
We continue the holdfast for a strong hold onto the hardground.
November 14, 2025 at 8:42 PM
Step 15+16:
Stem is ready...so we move down to the basement: the holdfast.
November 14, 2025 at 8:41 PM
Steps 13+14:
Finally the stem starts to look like something... 👌🏻
November 14, 2025 at 8:38 PM
Steps 11+12:
Building of the stem continues!
November 14, 2025 at 8:36 PM
Steps 9+10:
...more work on the stem needed...
November 14, 2025 at 8:35 PM
Steps 7+8:
Building the stem!
November 14, 2025 at 8:32 PM
Steps 5+6: more calyx!
November 14, 2025 at 8:31 PM
After printing & painting 1+2 we are ready to begin to build our first Crinoid!

Steps 3+4: let's start with the "top"...the calyx
November 14, 2025 at 8:30 PM
Step 1 & 2:
Print out the basics !

Source:
U.S. DEPARTMENT OF THE INTERIOR / U.S. GEOLOGICAL SURVEY: Crinoids
A computer animation and paper model by Tau Rho Alpha*, Dorothy L. Stout0 and Scott W. Starratt* Open-file Report 97-91A

pubs.usgs.gov/of/1997/0091...
November 14, 2025 at 8:26 PM