Fossils and the Birth of the Geological Time Scale

  • Peter D. Ward


How old are the rocks on Sucia Island? How many years ago were the greenish sandstone and silts so rich in fossils not the stony outcrops we see today, but rather a vibrant, living seabed, home to an entire bestiary of extinct organisms? How long ago did the long-necked, scaly sea reptiles and archaic shelled mollusks live their lives? How long ago? We cannot bring back to life this world gone by until we know its age. Finding the age of Sucia Island is our first task in this journey, just as it is usually the first scientific project undertaken as by every neophyte geologist.


Sedimentary Rock Rock Type Time Machine Geological Time Scale Fossil Content 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer Science+Business Media New York 1998

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  • Peter D. Ward

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