Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Do you really want to delete this prezi?
Neither you, nor the coeditors you shared it with will be able to recover it again.
Make your likes visible on Facebook?
Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.
Transcript of petrology overview
rock=aggregate of minerals
3 types; Igneous, metamorphic, sedimentary
created from a melt-generally a chemical change- where rocks melt and recrystallize
classification is based on textures and mineral compostion
process of changing rocks due to weathering (breakdown of rock) and erosion (movement of weathered material), and compaction of these sediments and cementation with CaCO3 or SiO2
deformation due to heat and pressure-
low heat, high pressure (high deformation) or
high heat, low pressure (low deformation)
aphanetic-can't be seen with the naked eye (crystal grains)
2. phaneritic-can be seen with the naked eye (crystal grains)
3.porphorytic-matrix aphanetic with large clusters of phaneritic pieces
4. pegmatitic- crystals of minerals larger than thumb
5. glassy-vitreous, glossy, due to quick cool
6.amygdoloidal-having infilled vesicle with another mineral
7. vesicular-having holes
8.scoreacious-frothy rough texture with vesicles that extend over the surface
Types of sedimentary rocks
clastic-based on grain size
chemical-due to a chemical process or organic material being present
evaporate-due to the evaporation of water
biochemical-organic material such as decaying flora present
reactive-effervescence in presence of acid
Types of metamorphosis
Regional-large scale high pressure, low heat, creates foliated rocks (schist, granite)
Contact-small local scale, creates a "bake zone" around the rock, high heat (not enough to melt) and low pressure-creates non-foliated rocks
Mafic-iron, magnesium rich, dense, dark colored, high melting points, rich blacks, reds, dark greens(olivine)
Felsic-light colors,light weight, Potassium, Sodium rich, low melting points(microcline)