Geology Reference
In-Depth Information
(b)
(c)
(d)
Figure 3.9.
(b) Aplitic sill intruding granite at Paarlberg, near Cape Town, South Africa. Note that the sill is
more resistant than the presumably metamorphosed rock immediately adjacent to it, but less
resistant than the fresh granite. (c) Aplitic sill level with granite surface, Freeman Hill, north-
western Eyre Peninsula. (d) This aplite vein, also at Freeman Hill, is more resistant than the
granite into which it is intruded and stands up as a low wall (except where, as in the foreground,
the aplitic blocks have been removed for use in local buildings).
