Geology Post

After all that excitement of the previous two posts I definitely need to get back to roots. At least for the moment.

Yesterday, I was looking back through some of the pictures and images I got while putting my geology thesis together. I got some really cool pictures and for any of the geologist teachers that may swing through here, feel free to use the pictures for teaching aids.

This is a sketch I made from a thin section (cut parallel to lineation and perpendicular to foliation, is that right? i cant remember) about 9 years ago (*geeze* it dosen't seem that long).
Red/pink colors are garnet.
The green is a chlorite reaction rim contacting the dominantly muscovite matrix.

I believed and still do that there are two generations of garnet growth. The older showing a poikiloblastic internal structure. The younger did not.

On one garnet I highlighted asymmetric quartz tails.
The beige I never actually identify. Though it could have been andalusite. It was very homogenous...almost microscopic oatmeal structure.

Roche Moutonnee

While I was on that cycling ride in Bethel last week I snapped this pic of a ROCHE MOUTONNEE. Two actually.

It is a French term : roche= rock. moutounnee = something, i don't know i'm not French. my French-English earth science dictionary defines it as 'ice smoothed rock, glaciated knob'

Its often referred to as a 'sheep back' or 'whaleback', I have heard both.

They are glacially shaped so, tn this case ice sheet movement was from right to left. The ice ramps up the low angle side and will 'pick off' material on the steep side. Aerodynamic, if you will.

Anyway, its also a nice picture.