Biotic, Abiotic, Pre-Biotic, Post-Biotic Controls on Carbonate and Phosphate Formation

Explore the spectrum of crystallographic textures in carbonate and phosphate minerals through this 56-minute lecture. Delve into the complex interplay between biotic and abiotic processes in mineral formation, and learn how organisms exploit both controlled biomineralization and abiotic mechanisms. Discover the importance of crystallographic properties in identifying the biotic origin and biological affinity of deep-time marine minerals. Gain insights into Electron Backscatter Diffraction (EBSD) techniques, including sample preparation and data analysis, for studying fossil carbonates and phosphates. Examine topics such as biologically mediated carbonate formation, carbon isotope excursions, microbial reefs, and priority preservation in sedimentology. Understand the significance of crystallographic orientations, EBSD mapping, and X-ray diffraction in resolving formation processes. Explore case studies, including Chelsea's work on misorientation, and participate in a Q&A session to deepen your understanding of this fascinating field.

Introduction
Overview
Electron backscatter diffraction
Crystal lattice diffraction
Identifying grains
Biologically mediated carbonate
Carbon isotope excursions
Microbial reefs
Crystallography
ABSD
Priority preservation
Sedimentology
Microfossils
Crystallographic orientations
absd map
xray diffraction
Uncertainty
Larger grains
Chelseas work
Misorientation
Thank you
Questions
Suggestions
Conclusion