Geoscience Reference
In-Depth Information
k
=
∞
K = 1
R
xy
-1
K =
Constrictional
strain
R
yz
-1
R
xy
=
1+e
1
1+e
2
Flattening
strain
Simple flattening
1
k
= 0
1
R
yz
=
1+e
2
1+e
3
Figure A8.6
The Flinn diagram uses measurements of the principal strain axes in deformed rocks to
distinguish constrictional from fl attening strains. The equiline (k = 1) bisecting the plot represents plane strain.
R
xy
and R
yz
are the principal plane strain ratios, calculated from the principal longitudinal strains e
1
, e
2
and e
3
.
(Modifi ed from Ramsay and Huber 1984.)
