GEOL 104 Lecture Notes - Lecture 6: Principle Of Faunal Succession, Radiometric Dating, Syncline

• School: Queen's University
• Department: Geological Sciences and Geological Engineering
• Course: GEOL 104
• Professor: Daniel Layton- Matthews

Document Summary

Correlation of layers: to apply these rules across the earth, rocks of similar age in different regions are correlated using physical characteristics, fossils, and radiometric dating. Applying the rules: relative age determination: consider this block of geological history, we see: folded sediments, intrusions, granite, a fault, inclusions, contact metamorphism (baked contact) A geologic history must have progressed as follows: a sequence of horizontal strata accumulates. Superposition dictates that 1 is the oldest: an igneous sill intrudes. Inclusions of 4 or 5 in the sill confirm that it is younger: folding, uplift, and erosion take place. Folding occurs after the intrusion is itself folded: a granitic pluton intrudes the folded sediments. Inclusions fall into the magma, which bakes the country rock: a fault cuts the granitic intrusions and the folded sediments, a basalt dike cuts across the block, feeding a volcano. The dike cools, the volcano and the land are eroded. There are 3 types of faults: normal, reverse, and strike-slip.