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The development of cave exploration
Late 15th to 16th centuries
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19th century accepted acid action already appeared associated believed bones called carbon dioxide carried cause Cavern caves cavities century channels Chapter connection considered containing continued course deep deposits descent described detailed developed dissolved early earth effect erosion evidence existence explanation exploration extensive fact FIGURE fissures Flood flow formation formed further ground growth Hole idea important included influence interest Italy jama karst known lake later less limestone Martel material matter means mentioned mineral mountains natural noted observations occur origin particular passages present probably produced published reason recorded region remains result rise river rock roof seen shows side significant similar sink Society solution speleogenesis speleothems springs stalactites stalagmites stone streams supposed surface survey theory thought tion underground vapours views visited walls