James Witts
@jdwitts.bsky.social
NERC Postdoctoral Researcher in Palaeoecology @nhm-london.bsky.social Fossil-wrangler (mostly in the Cretaceous, dabbling in the Jurassic, Paleogene, and more recent), big fan of (southern) high latitudes. Ferroequinologist. Views are my own.
Ammolite shells tend to be very obviously compressed. Also its not only found in Placenticeras in Canada - I've seen ammolite specimens of both Baculites (a 'heteromorph') and Sphenodiscus in the Campanian and Maastrichtian of the US Western Interior.
October 30, 2025 at 11:22 PM
Ammolite shells tend to be very obviously compressed. Also its not only found in Placenticeras in Canada - I've seen ammolite specimens of both Baculites (a 'heteromorph') and Sphenodiscus in the Campanian and Maastrichtian of the US Western Interior.
Weird paper. I've looked at hundreds of SEMs of ammonite nacre, including ammolite. It's clear when you compare that nacre tablets are compressed and the interstitial gaps (normally full of organics) are closed in ammolite. Definitely due to specific diagenetic conditions after death & burial.
October 30, 2025 at 11:20 PM
Weird paper. I've looked at hundreds of SEMs of ammonite nacre, including ammolite. It's clear when you compare that nacre tablets are compressed and the interstitial gaps (normally full of organics) are closed in ammolite. Definitely due to specific diagenetic conditions after death & burial.
Glad I'm not the only one who does this!
October 29, 2025 at 6:49 PM
Glad I'm not the only one who does this!
I'd never even heard of Charlie Kirk until he was killed. Neither had most 🇬🇧 people I know in Real Life. 🙄
October 1, 2025 at 9:35 AM