54.0 Black fossiliferous chert. England. A weathered surface colored by yellow orange limonite or goethite covers the coral-bearing black chert (typically called “flint”) of this sample. [Scale shows mm and cm divisions.]

Image 112 of 156

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54.0 Black fossiliferous chert. England. A weathered surface colored by yellow orange limonite or goethite covers the coral-bearing black chert (typically called “flint”) of this sample. [Scale shows mm and cm divisions.]

54.0 Black fossiliferous chert. England. A weathered surface colored by yellow orange limonite or goethite covers the coral-bearing black chert (typically called “flint”) of this sample. [Scale shows mm and cm divisions.]

Image 112 of 156

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