Spectacular fossil treasure trove pushes back origins of complex animals https://www.ox.ac.uk/news/2026-04-03-spectacular-fossil-treasure-trove-pushes-back-origins-complex-animals

The dawn of the #Phanerozoic: A transitional fauna from the late #Ediacaran of Southwest China https://www.science.org/doi/10.1126/science.adu2291

"A newly discovered fossil site in southwest China has transformed our understanding of how complex animal life emerged on Earth, revealing that many key animal groups had already evolved before the start of the #Cambrian Period."

#Cambrian ( /ˈkæmbri.ən, ˈkeɪm-/ KAM-bree-ən, KAYM-) is the first geological period of the #Paleozoic Era and the #Phanerozoic Eon.[5] The Cambrian lasted 51.95 millio
The #Phanerozoic Eon constitutes the current and most biologically dynamic division of the geological time scale. Spanning the interval from approximately 538.8 million years ago (Ma) to the present day, it represents roughly the last 12% of Earth's 4.54-billion-year history
#WhatIs #EarthScience #Evolution #Paleontology #sflorg
https://www.sflorg.com/2025/12/wi12212501.html
What Is: The Phanerozoic Eon

The Phanerozoic Eon: An Exhaustive Analysis of the Era of Visible Life

#WeekendReading: Canfield et al., looking at some proxy records for continental weathering to see how it changed between the #Proterozoic and #Phanerozoic, and how it might have affected the #sea.
https://www.pnas.org/doi/10.1073/pnas.2507312122

#WeekendReading: Clara Blättler on the strengths and limitations of reconstructing #seawater major-ion reconstructions through the #Phanerozoic from fluid inclusions in #salt.

Link: https://www.sciencedirect.com/science/article/pii/S0012825225001035

#WeekendReading: Faulkner et al. on how the test walls of foraminifera change through the #Phanerozoic and what might have to do with #ocean chemistry.
https://royalsocietypublishing.org/doi/10.1098/rspb.2025.0221
I have my own critique on the possible over-focus on #reefs sometimes, but the simple fact is, today and across the #Phanerozoic, reefs have been loci of #biodiversity hotspots.
https://www.biorxiv.org/content/10.1101/2025.01.16.633324v1
Reefal regions were biodiversity hotspots throughout the Phanerozoic

Reefs are important hotspots of marine biodiversity today, and acted as cradles of diversification in the geological past. However, we know little about how the diversity of reef-supporting regions varied through deep time, and how this differed from other regions. We quantified regional diversity patterns in reef-supporting and non-reef-supporting regions in the fossil record of Phanerozoic marine invertebrates. Diversity in reef-supporting regions is on average two- to three-fold higher than in non-reef-supporting regions, and has been remarkably stable over timescales of tens to hundreds of millions of years. This signal is present in both reefal and non-reefal facies within reef-supporting regions, suggesting that reefs enriched diversity in surrounding environments. Sepkoski’s ‘Modern Fauna’, an assemblage of higher taxa that includes gastropods, bivalves and echinoids, has been a key component of reef-supporting regions since the Paleozoic, contrasting with its later rise to dominance in non-reef-supporting regions during the later Mesozoic–Cenozoic. One-Sentence Summary Regions of the globe that supported reefal environments have been key hotspots of marine animal diversity for over 400 million years. ### Competing Interest Statement The authors have declared no competing interest.

bioRxiv

An important — but also surprising — study reports new climate estimates over the last 500 million years.

It estimates Earth's mean temperature has swung between ~10 °C and ~35 °C (~50 °F and ~95 °F), a much larger range than previously believed.

#climate #Phanerozoic #DeepTime #CarbonDioxide

https://www.science.org/doi/10.1126/science.adk3705

Plate tectonics in the Archean: Observation versus interpretation

The plate tectonics theory established in the 20th century has been successful in interpreting many geological phenomena, processes, and events that have occurred in the Phanerozoic.

Phys.org

Revolution an der Tanzbar: The #Ocean - #Phanerozoic II (Live for Roadburn Redux)

"We wanted to give people 2 totally different experiences with these 2 shows. Phanerozoic I was streamed live from a venue in the port of #Bremen, with big lighting production, kind of the way people know us. For Phanerozoic II, we wanted to do something more cinematic visually, and at the same time more intimate. We wanted to capture the feeling of the 6 of us in a relatively small, confined space, facing each other, in a circle... without a stage or a crowd being any part of this equation. It was March and the room that we spent the whole day in was cold, but that was part of the vibe. We had to warm up our fingers constantly.” comments the band.

https://www.trueten.de/archives/12871-Revolution-an-der-Tanzbar-The-Ocean-Phanerozoic-II-Live-for-Roadburn-Redux.html

#PostMetal #ProgressiveMetal #Sludge

Revolution an der Tanzbar: The Ocean - Phanerozoic II (Live for Roadburn Redux) | trueten.de