Geology exam

  • Igneous

Granite:

  1. black pink white gray mashed together

  2. coarse grained

Obsidian:

  1. Black shiny and smooth

  2. very fine grain

Gabbro

  1. Black and white fine grain that it spotty mixed

  2. fine grain

Scoria

  1. Black spider web type of look

Basalt

  1. Fine grain that is dark grey almost smooth but tiny bumps

Pumice

  1. light and spidrr webby type of look

Periodite

  1. green and white and gray

  2. fine grain

Volcanic Breccia

  1. mostly pink with some white in it

  • Metamorphic

Gneiss

  1. lines of black white and sparkly

  2. fine grain

Quartzite

  1. mostly white with some reddish blotches in there

Marble

  1. cloudy white with sprakley parts

Slate

  1. Flat gray and pretty smooth feeling

Chlorite Schist

  1. Black with some smooth parts in it, shiny