Geological structures exposed - for iPod/iPhone

12 Episodes

Reverse

Geological structures exposed

2010-04-1200:36

A short introduction to this album.

Overview of the Orogenic Belt

2009-06-2304:55

The three main components of the Orogenic Belt; Lewisian gneisses, Torridonian sandstone and sediments laid down from Cambrian times.

A history of movement

2009-06-2304:21

Evidence that the Moine Thrust is the result of frictional sliding.

Ductility of the Structures

2009-06-2301:18

The ductility of structures of rocks from the Dalradian supergroup.

Kinematic indicators

2009-06-2304:54

Evidence of indicators which suggest the direction of movement within slices of rock.

Using dikes as kinematic indicators

2009-06-2307:16

A dike that is deflected 45 degrees when entering a sheer zone provides a valuable kinematic indicator.

Shear Zone movement

2009-06-2302:55

An assymetric porphyroblast reveals a sense of movement within Myelenite gneissic banding.

Locating synforms

2009-06-2304:07

Asymmetric fold pairs and ductile structures in the inner zone at Scotlands Kilmore Bay.

Cleavage vergence test

2009-06-2303:05

Evidence for crossing the axis of the synfold.

Structural chronology

2009-06-2304:28

A closer look at folds and deformation.

Deformation history

2009-06-2303:06

Geologist John Whalley explains how in structural chronology downwards facing folds will cause the rock structure to start younging.

460 million years ago

2009-06-2303:19

The evidence for an Arc-continent collision around 460 million years ago in the Scottish Highlands.

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