Earth Sciences 1022A/B Lecture 8: Lecture 8 - Geologic Time
17 Jan 2012
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Document Summary
each bed is older than the one above, and the younger than the one below: original horizontality, cross-cutting relations. a fault is younger than the rock it cuts. a rock is younger than the rock it cuts: inclusions y unconformities. Inclusions are older than the rock containing them: angular unconformity. between flat and tilted, eroded beds: disconformity, nonconformity. between flat beds on eroded igneous, metamorphic rocks y correlation: matching rock features, fossils, etc, fossil succession. oldest rocks on earth are found in canada (east side of. Hudson s bay 4. 28 billion years: radiocarbon (c14) dating. In organisms c14 decays to n14 with half life of 5730 years but is replaced by c14 form the air.
