Tillicoultry Quarry is situated
to the west side of the Mill Glen. Although quarrying no longer takes
place the quarry is still very prominent on the hillside.
working quarry in 1975
is reproduced with the permission of the British Geological Survey
Permit number IPR/68-32CW"
Technical details of
the rock produced in the quarry are provided by the British Geological
Survey as follows :
the Ochil Fault-intrusion forms the face to the left of the photograph.
Lavas, hornfelsed by an adjacent diorite intrusion, occur at the right
(north). Contact of dolerite and hornfels passes up the right side of
the prominent rib of rock to skyline. Quartz-dolorite forms
a reliable source of good
road metal(aggregate). A variety of current and former crushing plant
is seen on the left, while behind and to the left are
stockpiles of aggregate The
Ochil Fault-intrusion comprises five irregular, discontinuous, pod-loke
bodies of quartz-dolorite intruded along the plane of the Ochil Fault.
Hornfelsed rocks are rocks that have undergone recrystallization due
to the heat from a nearby igneous intrusion, they are said to have undergone
The photographs below were taken
in August 2005 from the glen path