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Petrology (Cc04533), Siliceous Rock
Petrology (Cb3855), Red Marl
Petrology (Cb3856), Tea Green Marl
Petrology (Cf2762), Hertfordshire Puddingstone
Petrology (Cc04464), Ripple marks
Petrology (Cc6068)
Petrology (Cc04481), Great Oolite
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