Geoscience Reference
In-Depth Information
8
Figure 8.21
A deformed conglomerate showing fl attening of pebbles
that were probably much nearer spherical in the original sediment,
Bhutan. (Tom W. Argles, The Open University, UK.)
(a)
(b)
(
(
Figure 8.22
Examples of different fold tightness. (a) An open fold in low-strain strata, near Minehead,
Somerset, UK. (b) Tight folds indicating high strain are cross-cut by an undeformed (later) granite (top), Glen
Gairn, Scotland. (c) Isoclinal folds show intense strain in metamorphosed mudstones (dark) and sandstones
(pale brown), southern Spain. (d) Monocline in Carboniferous sedimentary rocks, Northumbria, UK. Hammer
near centre for scale. (a and d: Angela L. Coe, The Open University, UK. b and c: Tom W. Argles, The Open
University, UK.)
