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#ammonite

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Were you tragically unable to attend our recent Paleo 2025 symposium? Were you there but want to listen to one of the talks again? You're in luck! We've just posted the talk recordings to our YouTube page. There's a dedicated playlist for the Paleo 2025 talks, which can be found at

youtube.com/playlist?list=PLIb.

Where Have All the #Ammonites Gone? hakaimagazine.com/news/where-h by Riley Black (2020)

Dr. Kathleen Ritterbush: "Modern #squid and their relatives have obscene boom-bust cycles on seasonal, annual, and decadal timescales... no one knows what causes these fluxes... We can’t say what they’re going to do next Tuesday... It’s possible that ammonites also followed such volatile cycles. If the #asteroid struck during an #ammonite bust, you could tank the smallest ammonite population on their worst day"

This is a fossil of two ammonites from the Jurassic period (201-145 million years ago) that I dug up in BC near Harrison Lake. Ammonites were sea creatures with shells ranging from a few millimetres to two metres across! They resembled squid living in a giant snail shell, similar to the still living nautilus... but only their shells remain.

I love this fossil because the shells look like roiling sea monsters emerging from the depths.

You often see Jura Yellow limestone, which was fomred in the Jurassic, used as flooring in shopping centres, but I was really pleased to see that our local hospital is clad in it. The big difference for me is that in flooring, it is polished and often a bit worn, and that a lot of the detail is lost. This unpolished slab has a good few cephalopods in it, including this #ammonite; the detail visible - chambers, keel - is superb (and I love the calcite infilling).

JY comes from just near Solnofen in Germany, but it is older than the famous Solnhofen Plattenkalk. It has ammonites, belemnites, nautiloids, sponges, trace fossils (burrows etc) - a really good record of a marine ecosystem in a warm, shallow sea.

Today I got up early,
While Sue went to work.
I did more car research,
And phone calls.
We might have a plan,
But it isn't cheap.
I am hoping luck is on our side,
In so far as no one beats us to it.
My brain needs a rest,
From all the car stuff.
I have to treat it like an office job,
Or I couldn't do it at all.
But a job with no pay,
Nor evenings and weekends.
And still no sign of scaffolders,
So did caretaking and cleaning.
Brain aches now,
I think I need sleep.
Off to bed now,
Repair Cafe in the morning.
#NightAll

Update:
Some very interesting replies to this question
Kid asked very good question this morning: why is this fossil ammonite in a round concretion? As in how was it preserved? (I explained that in some locations you find roundish stones that when broken in half reveal a fossil ammonite or other fossil inside). But why do they form in these roundish shapes? What is the preservation method.
I no longer remember where this came from but I think, Whitby?

Version 1 of a tiny pair of earrings - didn't like them. Will try again. Pushed my epoxy too far, and thought I could use it to finish these up. I was wrong... too gummy, didn't leave me time to properly fit all the amber.
Ebony, amber, and epoxy resin, ~2" tall, and ~2.5mm thick. Slow, careful cutting with my scrollsaw.