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Ge 101. Introduction to Geology and Geochemistry
Lecture 16. Narratives from Geologic Maps; Introduction to
Earth History
Image 16.1. Grand Prismatic Pool, Yellowstone National Park
Image 16.2. Modern stromatolites, Bahamas
Image 16.3 Cambrian stromatolites
Ancient stromatolitesform columns.
Modern stromatolitesgrow in the intertidal zone.
A cross section reveals layering similar to that seenin ancient stromatolites.
Microbes live on thesurface of the stromatolite.
Sediment is depositedon the microbes,...
...which grow upward through the sediment, forming a new layer.
Image 16.3. Building microbial mats (stromatolites)
Image 16.5. Ediacaran embryo
Image 16.6. Ediacaran ecosystem
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