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Petrology (Cc04533), Siliceous Rock
Petrology (Cb3855), Red Marl
Petrology (Cb3856), Tea Green Marl
Petrology (Cf2762), Hertfordshire Puddingstone
Petrology (Cg3100), Quartzite
Hand specimen light grey quartzite with several light buff coloured silicified wood stems with internal cavities preserved, ie no or only partial crystal infilling .
Petrology (Cc04464), Ripple marks
Petrology (Cc6068)
Petrology (Cc04481), Great Oolite
1 to 40 of 2985