EARTHSC 1G03 Study Guide - Final Guide: Phyllite, Mesozoic, Metamorphic Rock
15 Sep 2016
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Requires heat heat comes from poor heat distribution. Cementation: precipitates bind the grains of sediment together. Contact: formed with heat by touching magma in magma chambers. Regional: pressure from tectonic plates usually foliated deep underground. Laciers cannot form metamorphic rocks lack of heat. Not as much pressure as a continental collision. Protolith: the solid rocks that form a metamorphic rock. Pressure-temperature (cid:539)p-t(cid:540) diagram: although pressure is on y-axis, negative to match depth of arth. Foliation: compression that causes platy elongation from dragging, shearing, etc. , i. e. look for long streaks planar texture. Neissic: course alternating layers of parallel foliation because so much pressure. Non-foliated: no preferential grain alignment due to uniform stress. Uartzite: quartz sandstone cleavage not along boundaries between di erent rocks. Ductile: stays one piece, but changes shape more common when hotter temperatures. Normal: dip angle > pi/(cid:473) hanging wall goes down relative to footwall. Reverse: dip angle > pi/(cid:473) hanging wall goes up relative to footwall compression.
