Page 192 - Microtectonics

6.3 · Fringe Structures 181
Fig. 6.25. Different fibre patterns that develop due to different rotation
rate of the core-object relative to the fringes. Core object rotates with
the fringes on the left hand side and twice as fast on the right hand side

Fig. 6.26.
Four types of strain fringes
with elongate core objects, after
Köhn et al. (2003). Fringe and
fibre geometry depend on the
orientation of the core objects
at the start of fibre growth. nw,
wn etc. refer to wide or narrow
dimension of the core object in
its initial and subsequent orien-
tation due to core object rota-
tion. Geometries shown are in
samples from Lourdes, France.
Width of view about 8 mm. CPL.
(Courtesy Daniel Köhn)