#Chitonida (#Mollusca) exist since the #Cambrian. Bodies are covered with #calcareous #plates, flexibly connected. Most feed on vegetation cover. The #CambrianExplosion made based i.a. on #oxygen significant leaps in #animalevolution. Y. Zhang et al. (2025) assume a change in Earth's orbit altering #solarradiation, leading to land #weathering and #nutrients flow to the sea. Algae thrived and produced much oxygen.
© #StefanFWirth 2025

Ref
https://doi.org/10.1029/2025GL118689

#Pics
#AIassisted, © S.F.Wirth

#WeekendReading: Pederso et al., on the complex processes from deposition, dissolution, and precipitation of #calcareous #microbial mud along a fresh to saline water gradient.

https://onlinelibrary.wiley.com/doi/10.1111/sed.13196

Advanced imaging reveals the last bite of a 465-million-year-old trilobite https://phys.org/news/2023-09-advanced-imaging-reveals-million-year-old-trilobite.html

Uniquely preserved gut contents illuminate #trilobite #palaeophysiology https://www.nature.com/articles/s41586-023-06567-7

"The digestive tract of the trilobite #Bohemolichas incola was tightly packed with #calcareous #shells and their fragments that belonged to marine #invertebrates such as #ostracods, #bivalves and #echinoderms, some of them identifiable to the species level."

Sea level rise in the Mediterranean Sea, a first victim https://ecoevocommunity.nature.com/posts/sea-level-rise-in-the-mediterranean-sea-a-first-victim #ClimateCrisis #ClimateChange #Algae

Impact of #SeaLevelRise on the Mediterranean Lithophyllum byssoides rims: Aurélie Blanfuné et al. https://www.nature.com/articles/s41598-023-37110-3

"In the #Mediterranean, #SeaLevel has already risen by 16 cm in 100 years. Although this increase may seem modest, it is already impacting one of the most emblematic habitats of the Mediterranean: the rims of the #calcareous red alga #Lithophyllum byssoides."

In a new #TablasCreek blog I dive into how the storms we've gotten this winter have changed the landscape. Most interestingly, they've revealed the harder #limestone layers that run like veins through the softer #calcareous clay. This spillway from our reservoir is a great example of how the water chews through the softer layers until it reaches a limestone shelf. (And, I think, a super cool #photo!)

https://tablascreek.typepad.com/tablas/2023/02/the-adelaida-districts-limestone-layers-laid-bare.html

#wine #vineyard #geology #photography #PasoRobles #TablasBlog

#Calcareous Cab from York Mountains in #PasoRobles this evening

#wine
#wineries
#cabernet