Deformation and Metamorphism
Deformation and Metamorphism
Deformation and Metamorphism
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9. Collect a specimen of the ‘parent’ (sedimentary) rock shale, <strong>and</strong> also<br />
specimens of slate, schist <strong>and</strong> gneiss — rocks formed by increasing<br />
degrees of regional metamorphism of shale.<br />
Record the characteristics of each rock type in the table below.<br />
Feature<br />
Rock type<br />
Shale Slate Schist Gneiss<br />
Colour<br />
Approximate<br />
grain size (mm)<br />
Layers present?<br />
Name of texture<br />
Labelled sketch<br />
of rock, showing<br />
texture.<br />
10. The diagrams below represent photomicrographs showing some<br />
examples of textures present in metamorphic rocks.<br />
Foliated/non<br />
aligned<br />
Foliated/non<br />
aligned<br />
Foliated/non<br />
aligned<br />
Foliated/non<br />
aligned<br />
a. By crossing out the incorrect words, indicate which of the diagrams<br />
show a non-aligned texture <strong>and</strong> which show some form of foliation.<br />
b<br />
Name the likely rock types, choosing from the following names:<br />
Quartzite, marble, schist, gneiss<br />
Topics 1.3.3 & 1.3.4 <strong>Deformation</strong> & <strong>Metamorphism</strong> Page 32 of 33
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