GEOL 104- Final Exam Guide - Comprehensive Notes for the exam ( 32 pages long!)

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

Document Summary

Rare composition that is composed entirely of ferromagnesian silicates. Silica (sio2) content in crustal rocks exhibits a considerable range - a low of 40% in ultramafic rocks. Used to described the overall appearance of an igneous rocks based on the size, shape, and crystal arrangement of interlocking crystal. Tells us about the environment in which the rock was formed. Three factors affecting crystal size: rate of cooling. Slow rate promotes the growth of fewer, but larger, crystals fast rate forms many small crystals. Very fast rate forms glass (unordered ions: amount of silica (sio2) present, amount of volatiles (dissolved glass) Aphanitic texture (can"t be seen with the naked eye) Continental plate connected to an oceanic plate without any subduction is a passive plate i. e. alaska, east of south america. When india collided into china the ocean submerged under china but the front between india and the ocean was passive.