GEOL 104 Lect13

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Department
Geological Sciences and Geological Engineering
Course
GEOL 104
Professor
Michael T.Mc Bride
Semester
Winter

Description
Relative datinguse of fossilsIndex fossilsrepresent best fossils for correlation they are widespread geographically and are limited to a short time spanAssembledge of fossils with overlapping time ranges may be useful if no index fossils are present Absolute TimeVarious attempts to determine absolute agePeople have used various methods to uess the age of the earth such asThe old testamentthe evolution of speciesheat flow calculationsrates of depositionThe speed at which rivers brought salt to the seaBecqueral found photographic plates darkened by uranium salts and this property was termed radioactivityIt was then discovered that radioactivity gives off heatBoltwood used this proces
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