27 July 2018
Hiking Siyeh Pass in Glacier in Glacier National Park on Tuesday with my Montana State University field course, we spotted a few new folds in the Empire Formation (a transitional unit between Helena Formation and Grinnell Formation).
Here is one of the students serving as a sense of scale, with interesting features on either side of him:
On the left, there are small scale folds in a regular little train:
Note the cleavage in the central shaly unit in this part of the outcrop – it is subvertical on the left (west), but then leans over to dip to the west on the right (east):
Here’s another site, a little bit further down the trail, showing another example of small-scale folding:
Happy Friday to all! We’ll be spending our day driving back to Bozeman after a successful field course.