Transcript Slide 1

ESTA September 2004
EDIBLE GEOLOGY 1
Jo Conway
Yale College of Wrexham
Cumulates
WJEC A level Geology specifications
GL4 E1 Key Idea 1
Different environments and processes of
magma formation generate different
types of igneous rocks
KI 1c
gravity settling to give cumulates
Materials required:
Coloured paper
draw on magma chamber shape
Scissors/tape
“Smarties” or “m&m’s”
at least one large tube!
colours to represent the mixture of
crystals in a magma melt
Shape of magma chamber cut out of coloured paper
Random mix of crystals in magma
Denser crystals start to sink
CUMULATE LAYER
Second formed mineral starts to sink
And third formed mineral
Lighter
minerals
buoyed
upwards
And then……
You get to
EAT the experiment!!