ERTH 4801 Study Guide - Final Guide: Free-Air Gravity Anomaly, Post-Glacial Rebound, Seismic Tomography

• School: Carleton University
• Department: Earth Sciences
• Course: ERTH 4801
• Professor: G.Ranalli

Document Summary

Seismic waves record and calculate the travel times of velocity at depths of p & s waves assuming that the earth is elastic the gravity = density. The plot absorption of seismic waves with depth. This excludes everything ultra basic rock in mantle. 410 & 660 km at depth discontinuous, olivine p & t correspond with the top and bottom mantle zones. The mantle uniform ultra mafic with face changes of olivine=> does not mean bottom of mantle is chemically the same as upper mantle. Mg and fe in olivine 95% magnesium. Seismic tomography is the anomaly of p & s waves, scale in % The seismic velocity anomalies: composition, seismic anisotropy and temperature. The positive blue velocity seismic temp lower and negative red velocity seismic temperature is higher. The temperature anomalies in lower mantle in 100s of degrees. Ah is an harmonic- laterally density anomalies in lower 100.