Lecture 5 - atomic bonds and minerals

Lecture 5 - atomic bonds and minerals - Geol 1100...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Geol 1100 – Principles of Geology (Section 1) Lecture 5 – Highlights 1 February 2008 Finish Plate Tectonics (from last time) o Plate motions and velocity Absolute : plate motions relative to Hot Spots Relative : plate motions relative to one another; e.g., the motion of the Pacific How do we estimate plate motions? Hot Spot tracks (see above) – an absolute plate motion estimate Magnetic Anomaly patterns o We know the ages and durations of periods of positive and negative magnetic polarity (radiometric dating and paleomagnetism – recall previous lectures) o An estimate relative plate motion Other techniques now available o Global Positioning System (GPS): Precision less than 1 cm o Measures plate motions over the timespan of years o An estimate of relative plate motion Plate Motions range from less than 1 cm to approximately 10 cm o Driving Mechanisms Convection ( Slab Suction in your book) Slab Pull Ridge Push Which is the dominant force? Plate with subduction zones (particularly where very lithosphere is subducting)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/08/2008 for the course GEO 1100 taught by Professor Gomez during the Spring '08 term at Missouri (Mizzou).

Page1 / 3

Lecture 5 - atomic bonds and minerals - Geol 1100...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online