Members of a University of Vermont field geology course spent last Thursday afternoon at Exit 17 in Colchester, near the Milton border, recognizing rocks and taking measurements.

Geology-class-2Professor Keith Klepeis, pictured at right, led the 20 students in studying the limestone and sandstone that make up much of the Champlain Valley.

The studious group used geological compasses to discover the rock is not flat but tilted to form layers in mountain building. The students were trying to discover how the mountainous range was formed, Klepeis said.

This was his second time bringing a class to this spot, which, despite the noisy traffic, makes for good lessons, he said.