{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

06 MetamRocks - Large regions(volumes of rock are involved...

Info icon This preview shows pages 1–20. Sign up to view the full content.

View Full Document Right Arrow Icon
METAMORPHIC ROCKS CH 8 Metamorphic Rocks: form by mineralogical and/or textural change of igneous, sedimentary, & metamorphic rocks - all changes occur in the solid state ... recrystallization
Image of page 1

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

View Full Document Right Arrow Icon
Causes of metamorphism 1. Mineralogical changes: I) heat (temperature increases; T) ii) pressure P iii) rock composition 8.26
Image of page 2
8.22 The Geothermal Gradient: change of temperature with depth (pressure).
Image of page 3

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

View Full Document Right Arrow Icon
8.21 Sediment (burial) sedimentary rock metamorphic rock 11.23 burial during deformation P T
Image of page 4
2. Textural changes: types of stresses (pressures) [pressure = force/area] i) hydrostatic (lithostatic) ii) differential (deviatoric or nonhydrostatic) Compressive Tensional Shear 11.9
Image of page 5

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

View Full Document Right Arrow Icon
11.10 hydrostatic
Image of page 6
Types of Metamorphism 1. Contact Metamorphism Cause: heat from an igneous intrusion Stresses: hydrostatic Rock: hornfels - nonfoliated texture (random orientation of minerals) 8.23 8.10 micas amphiboles quartz prismatic sheets equant
Image of page 7

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

View Full Document Right Arrow Icon
2. Shear (Dynamic) Metamorphism (8.24) Stresses: shear Rock: Mylonite Fault
Image of page 8
3. Regional Metamorphism
Image of page 9

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

View Full Document Right Arrow Icon
Image of page 10
Image of page 11

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

View Full Document Right Arrow Icon
Image of page 12
Image of page 13

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

View Full Document Right Arrow Icon
Image of page 14
Image of page 15

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

View Full Document Right Arrow Icon
Image of page 16
Image of page 17

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

View Full Document Right Arrow Icon
Image of page 18
Image of page 19

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

View Full Document Right Arrow Icon
Image of page 20
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Large regions (volumes) of rock are involved. Occurs in mountain ranges- high temperatures & pressure- stresses are compressional FOLIATION: preferred mineral orientation (alignment of prismatic & sheet minerals) to compressive stresses 8.25 collision zone UP 11.2 Major Mountain Ranges on Land 8.13 8.12 Shale Slate 8.14 Deformed Conglomerate Conglomerate 8.5 sandstone quartzite Limestone Marble 8.17 Grades of Metamorphism- temperatures & pressures 8.18 LOW HIGH P MELTING (magmas) T Regional Metamorphism of Shale P. 218-219 slate schist gneiss shale Strong foliation Crystals become large New minerals are formed See also 8.19 8.3 Gneiss (banded) P. 202 Gneiss Index Minerals: minerals that indicate the grade of metamorhism- muscovite & biotite = low grade- garnet = medium grade- sillimanite = high grade Metamorphic Zones Northern Appalachians (8.20) The Rock Cycle (Interlude B, p. 228)...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern