Petrolab Limited

Plate 1 : (Sample ref removed)

A General view of sample (porosity shown by yellow dye)

B Quartz dissolution

C Clay matrix

D Carbonate cement

A Plane polarised reflected lightB, C & D Cross polarised transmitted light

BA

C D

500 m

250 m

250 m

250 m

quartz

feldspar

clay matrix

dissolution contact

clay matrix

feldspar

carbonate