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#carbonate

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Or M. Bialik

Just a gentle reminder that through geological time, shifts in #carbonate producers mean that the geometry of carbonate platforms (as well as #reef shape) changed.
Please try to keep that in mind when drawing your models. I'm trying to stay mad, but I'm actually just growing disappointed.

Different types of frame-rimmed platforms may develop as a result of differences in both types of frame-producing processes (biotic and/or chemical) and production loci. Source: https://onlinelibrary.wiley.com/doi/abs/10.1046/j.0950-091x.2001.00152.x
Public
Emilia Jarochowska 🇺🇦🌱

We've been working on a massive riddle tying together #self-organization, #carbonate #diagenesis, reactive transport, #paleoclimate and #Milankovich cycles, and very stiff PDE systems.

If you've missed the poster at #egu24, you can still find it attached to the abstract in the conference program (meetingorganizer.copernicus.or) and on Zenodo zenodo.org/records/10943274 If you're into numerical methods, tricky PDEs or other aspects of #modeling, please see if you have any advice to us 😄 #solvers #PDE

Plot showing an oscillating concentrations of calcite as a function of time. This is a numerical solution of a dynamical system formulated by Ivan L'Heureux (2018) describing self-organization in carbonate sediment, which results in emergent patterns that can be confused with Milankovich periodicity,
Public
Lukas VFN 🇪🇺

#Ediacaran #fossils reveal origins of #biomineralization that led to expansion of life on Earth
phys.org/news/2023-09-ediacara

Constraining the onset and environmental setting of #metazoan biomineralization sciencedirect.com/science/arti

"#Cloudina originated in a low #oxygen environment with periods of notably higher #oxygenation... it was not a case of sustained oxygenation that resulted in the appearance of #skeletonization... high #carbonate concentrations in the ocean were necessary"

Schematic interpretation of depositional environments across the study area in Tsau Khaeb National Park, Namibia, during which Cloudina biomineralisation occurred. A) Marine transgression led to deposition of sandstones and siltstones in a shallow shoreface; b) continued marine transgression forming an evaporite basin partially restricted from the open ocean; c) peak sea level with open marine conditions and extensive carbonate deposits; d) sea level fall during which Cloudina biomineralisation occurred in periods of oxygenation
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Daniel Fischer

Developing Tailored Data Combination Strategies to Optimize the #SuperCam Classification of Carbonate Phases on Mars: agupubs.onlinelibrary.wiley.co -> Optimizing #Carbonate Classification on #Mars: eos.org/research-spotlights/op - combining data from several of #Perseverance rover’s spectroscopic sensors offers a more accurate means to classify carbonate #minerals that may hold hints of ancient life.

Public
attresa.geo

The most beautiful calcite found in Poland was mined in the #Zelejów #quarry - Chęciny #marble or #Zelejówrose (since the 16th century). Its decorativeness is due to the crystalline structure of light #calcite surrounded by cherry #hematite. It has a diversified #ribbon-strip, #breccia or bow structure. Unlike classic marbles, it was not formed by metamorphic processes (advanced physical and chemical transformations of #carbonate #rocks ) but #hydrothermal #Wavellcastle was built from it.

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