ESSE 1010 Lecture Notes - Lecture 6: Buoyancy, Basalt, Volcanism

• School: York University
• Department: Earth, Space Science and Engineering
• Course: ESSE 1010
• Professor: Gary Jarvis

Document Summary

Mantle response: viscous flow in the warm interior, brittle fracture in the cold outer 100km. Same material above and below but different theology due to temperature profile with depth. Chemical: crust/mantle: depth = 5. 35km, mantle/core: depth = 2900km, lithosphere/deeper mantle : depth = 100km, upper/lower mantle: depth = 700km, inner/outer core: depth = 5200. Earthquake epicenters fractures of the brittle lithosphere. All major geological activity occurs at plate boundaries. Pressure release melting: partial melting of olivine, basalt erupts to form new sea-floor. Pressure at point a decreases as plates thin, and hot material rises towards.