Geosphere :earth_asia: :<3: (Metamorphic rocks (For example (Slate=…
Geosphere :earth_asia: :<3:
The physical properties of mineral:
Itś the particular, repeating geometric shape a mineral particles show.
When you see it with the naked eye, we call them cristal.
Colour and and steak
Some minerals have a characteristic colour
Most minerals can came in several different colour.
For example: Quarz-streak
Layers of the geosphere
Most common rock: Peridotite
It's solid but soft
It occupies most of the interior of the earth
The hottest part of the geosphere
outer core :arrow_right: liquid
inner core :arrow_right: Solid
Basically made of iron and nickel
The thinnest layer
Common rocks: Granite, Basalt and slate.
Types of rocks:
Sometimes their trap our bubbles inside.
Formed when lava on earth's surface cools and solidifies.
Obsidian (completely black with glassy shine)
Pumice (light, plants, in water, full of holes.)
Basalt (a dark matte rock)
Formed from molten rocks from the mantle .
Specific chemical composition
Characteristics of rocks:
Are formed from sediments or fragments of the other rock.
Can be formed by extreme pressure and heat.
Lava or magma from the earth's mantle.
Depends on the form, size and distribution of the grains or crystals it contain.
Made of several minerals
They have formed the compaction of:
Fragments of older rocks
These are rocks with grains (called clasts)
Joining the clasts together is a finer material which is called Matrix.
Other properties of minerals
If it breaks easily it's brittle.
For example Quartz (7). If not, itś tough.
It's the resistance a mineral has to breaking or bending of it is hit or deformed.
Fracture and cleavage
Fracture is the way a mineral breaks into irregular shaped fragments
Cleavage is the way a mineral breaks into regular shaped fragments
These describe how a mineral (breaks when hit)
For example: Gypsum used for construction.
It's measured using the Mohs scale.
It's the resistance of a mineral to being scratched by another mineral or object.
Slate= it has very tiny crystals, not visible to the naked eye.
Schist= It's crystals can be seen easily.
Some of them have layered form (called foliation)
Gneiss= This is formed of layer crystals that schist.
They have been transformed over time by intentense heat and pressure, deep under the ground.
They often have crystals that are easy to see (they solidifies slowly)
The most abundant rock on land.
One of the most used in construction.
The most abundant rock in mantle.
They are formed when magma under the earth's surface cools and solidifies.