While at Darling State Park a visit to Lake Willoughby is well worth the
trip (Figs. 19, 20). A glance at Figure 1 will show you its general
location. Once you visit this lake, you might ask “why so beautiful a
Lake Willoughby?” There is still some question as to the origin of the
lake basin, but a combination of oriented joints and recent glacial
movement seems to fit the picture. Deeper and faster weathering along
parallel joints together with glacial movement and scour in the same
direction as the joints probably dug the elongated trench which, when
filled with water, became Lake Willoughby.
It is hoped that this pamphlet has given you the desire to enlarge your
knowledge of the science of geology. Geology is all around you wherever
you might travel and a knowledge of geology will open new roads even
while traveling old ones. Here’s luck to you in your travels; try to
_see_ what you look at.
[Illustration: Figure 18. Geologic map of Darling State Park.]
Granite-Metamorphics
Observation Tower
Burke Summit Rd.
Bear Den Trail
Fire Trail
Park Boundary
Contour Line
Dip and Strike: Bed
Dip and Strike: Bed?
Dip and Strike: Joint
[Illustration: Figure 19. View of Lake Willoughby, seen from its
north shore. Mount Pisgah on the left, Mount Hor on the right. The
Lake Willoughby trough was produced by preferential erosion of a
joint system accentuated by glacial movement and erosion in the same
general direction. The lake bottom opposite Mount Pisgah is 210 feet
deep.]
[Illustration: Figure 20. Northwest View from the Burke Mountain
summit road. Picture taken just above the old C.C.C. Camp and the
present location of the Bell Gardens. Note Lake Willoughby trough in
the distance. Mount Pisgah is on the right and Mount Hor on the
left. Lake Willoughby lies in this trough.]