The 3 ROCKATEERS
By: Olivia Soto
What's a Rock?
A solid mineral material that forms part of the surface of the earth and other similar places, that are made of crystals and are identified on texture, and origin of its formation
The Igneous Rock
- Igneous rocks are formed by cooling and crystallization of molten rock
- They are formed inside the earth's lithosphere
- Intrusive-forms slowly with an outcome of big crystals
- Extrusive-forms quickly with an outcome of small crytstals
The Sedimentary Rock
- Formed by compaction and cementing
- They are formed around the earths surface
- BIO-clastic: rocks formed by the accumulation of plant and animal remains containing shells of plant materials
- Clastic: Different sized particles cemented together clasified by size
The Metamorphic Rock
- Formed by heat and pressure without melting
- Formed deep within the earth
- Foliated: Alignment of minerals in a metamorphic rock
- non-foliated: When minerals do not have a stripped banding pattern
Different Rockateers
Gabbro
- Formed in an intrusive environment(inside the volcano) slowly
- coarse texture with 1mm-10mm
- non-vesicular
- dark color/high density/Mafic composition
- 60% Pyroxene/40% Plagioclase feldspar/5% Amphibole/5% Biotite
Sandstone
- Inorganic
- Clastic fragmental texture
- Sand size 0.0004-0.006
- Mostly Quartz, feldspar, and clay minerals; may contain fragments of other rocks and minerals
- Fine-coarse
Gneiss
- Foliated Banding
- Medium to coarse grain size
- Pyroxene/Garnet/Amphibole/Feldspar/Quartz/Mica
- Increased heat and pressure (regional)
- High grade Metamorphism;mineral types segregated into bands
The Rock Cycle
The Rock Cycle is a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change into metamorphic rock or into igneous rock. Metamorphic rock can change into igneous or sedimentary rock.
Igneous rock forms when magma cools and makes crystals. Magma is a hot liquid made of melted minerals. The minerals can form crystals when they cool. Igneous rock can form underground, where the magma cools slowly. Or, igneous rock can form above ground, where the magma cools quickly.