MN rocks and waters study guide

MN rocks and waters study guide - proterozoic What does it...

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proterozoic What does it mean when we see well rounder and well sorted quartz? Whats the significance of seeing a basal conglomerate? Oolites- high energy formations, type of gain –distrupted from the sea floor, modern =more often made of lime. In what rocks are the following minerals found? And what are the differences between them? Chert- a sed. Form of amorphous/ fine grained silicia < found in beds Jasper- Magnetite Hermatite Turbidities- the sedimentary depository deposit of turbidity current shows graded bedding and sed. Structures on the underside of the ss Turbiditycurrents- a mass of mixed water and sediment that flows downhill along the bottom of an ocean/ lake because it is denser than the surrounding water. High speeds and erode rapidly What are the possible sources of iron and cilica? What is the relevance of the extensive iron formation? Plate Boundries Convergent: Divergent: Transform: What is convection and how is it related to plate techtonics? The driving force for plate techtonics
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MN rocks and waters study guide - proterozoic What does it...

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