The rocks at this site belong to
the Central Maine Belt, the same rocks that are under the college and much
of central Maine. Polydeformed means rocks that have undergone several
periods of deformation, in this case folding and faulting. Two maine
rock fold types are present here. Buckling is the result of compression
by pressure, while shear folds develop when layers slide relative to one
another.
Most of the rocks at Winslow
have a phyllitic texture, a wavy appearance of fine-grained minerals, mainly
muscovite or chlorite. Often developed perpendicular to a poorly
developed cleavage, and is a product of of relatively low- grade metamorphism.
The majority of the rock here is phyllite, which is a fine grained metamorphic
rock with a glossy appearance, this forms from the low-grade metamorphism
of slate.
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References
Laboratory Manual in Physical Geology,
Richard Bush
Prentice Hall Upper Saddle River,
NJ 04788, 2000
Lab Manual, John Hopeck
Bates College http://www.geo.berkeley.edu/geology/
John J Donavan, 1998.
http://www.geog.ouc.bc.ca/physgeog/contents/11b.html
Website by: Tyler Staples, Mike Kelley, Jason Cuthbertson, Jesse Morris