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ROCKS By Ilse P. Warning: contains jokes (Minerals (Crystal structure,…
ROCKS By Ilse P.
Warning: contains jokes
Minerals
Crystal structure
Naturally occurring
Solid
Definite composition
Inorganic
Rocks are made of more than one mineral, with no definite chemical composition or crystal structure.
Igneous
Forms when lava or magma harden
Intrusive
Slow cooling magma
Large crystals
Colorful (example: granite)
Extrusive
Small crystals or glassy
Fast cooling lava
Can have holes from air bubbles (example: pumice)
Glassy example: obsidian
Lava and magma come from volcanoes...
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Metamorphic
Formed by heat and pressure
Heat changes structure but doesn't melt
Can also be formed by tectonic plate collisions
Example: slate
Sedimentary
Clastic
Chemical
Organic
Formed when sediments compact together. Deposited in layers and contains sand, pebbles, and frequently fossils.
Broken down by weathering and erosion
Ice
Wind
Water
Glaciers
Gravity
Example: limestone
They rock!
Ha ha
Can be Organic
Fossils
Plant Material
Rocks can change from one type or rock into another because of the rock cycle.
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Mining
People mine to obtain ores, minerals, and gems.
Surface
Open pit mining
Strip mining
Subsurface
Shaft mining
Mining requires reclamation (returning the land to it's original state or better)
Wildlife is valuable!
Save the forests!
(Not a joke)
Have a nice day!
Or Dragons! =)
(If you know me, you know I had to make a dragon reference.)
It's
FABULOUS!
