wanted dead or alive
DESCRIPTION
Wanted Dead or Alive. Obsidian. Gneiss. Sandstone. Igneous. Mineral composition – Obsidian rocks are very rich in silica. Color- Obsidian has a shiny black or grey color. Texture - Obsidian is an extrusive rock that has a smooth shiny texture of a thick piece of glass. Sedimentary. - PowerPoint PPT PresentationTRANSCRIPT
WantedDead or Alive
GneissSandstone
Obsidian
IgneousMineral composition – Obsidian rocks are very rich in silica.
Color- Obsidian has a shiny black or grey color.
Texture- Obsidian is an extrusive rock that has a smooth shiny texture of a thick piece of glass.
SedimentaryMineral Composition- Sandstone is a sedimentary rock formed from cemented sand-sized clasts. The cement that binds the clasts can vary from clay minerals to calcite, silica, or iron oxides.
Color- Sandstone’s color is variable through grey, yellow, red to white reflecting the variation in mineral content and cement.
Texture- Sandstone is a clastic sedimentary rock that has a gritty texture.
MetamorphicMineral Composition- The most common minerals in this rock are quartz, potassium feldspar, and sodium feldspar.
Color- The color of Gneiss is an alternating of black and white.
Texture- Gneiss is a foliated metamorphic rock that has coarse grain and is non-micaceous.