Assignments
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Field Work #2
Your second assignment is to study the Mineralogy of the Northern Wisconsin and Upper Peninsula of Michigan region. Your assignment at this location will be to collect data for some stops and interpret/analyze data for other stops. Both assignments are located to the left, named "Data Collection" and "Data Analysis".
Field Notes
Stop 1:
Data Collection Assignment Stop 2: Rib Mountain *586 meter tall mountain, the highest elevation in Wisconsin *Most rocks and boulders appear to be Quartzite *Rock is extremely strong and weather resistant *Grey/white/clear in color *Bedrock is also quartzite *Ripple Marks can be seen on the bedrock in some locations Images Below: Rib Mountain (left), Quartzite Sample with Ripple Marks (right). Stop 3: Data Collection Assignment Stop 4: Crystal Falls Banded Iron Formation *Grey/Black in color *Formation consists mostly of iron *Some quarts veins present *Rust colored oxidation was seen all over *Bedding has been rotated completely sideways so that bedding is vertical to the surface *Formation stretches 15 feet above surface of the ground *Partially covered by water *"Blocky" fracturing apparent all over the place Stop 5:
Data Collection Assignment Stop 6: Lake Ellen Kimberlite *Kimberlite appears to be a large pit of sand/gravel/rock *Mafic minerals present including pyroxene, plagioclase, and olivine *Some quartz and pyrite minerals found *Hand samples contain tiny garnets *Kimberlites are known for diamond production but none of economic value are found here *Microdiamonds exist in this kimberlite pipe, but none were seen at surface *Pyroclastic material *Forms a large "bowl" at the surface |