Earth Shakes, Rattles,
What is the
the earths plates,
THE THEORY OF
Tectonics- large scale deformational features
of the crust
Earths outer shell divided into plates
Plates move & change in size thru time
Activity at plate boundaries
What Are Rocks?
Rocks are what the crust of the earth is made of. They are the mountains and the bottom of the ocean.
They are everywhere on earth, but often buried under soil. Rocks are made of minerals, like quartz,
calcite, feldspars, and micas. Most r
Joints (also termed extensional fractures) are planes of separation on which no shear displacement
has taken place. The two walls of the resulting opening typically remain in tight (matching) contact.
Joints may result from regional tectonics (
What are Minerals?
To meet the definition of "mineral" used by most geologists a substance must meet five requirements:
definite chemical composition
ordered internal structure
"Naturally occurring" means that people di
Physical Properties of Quartz
Quartz occurs in virtually every color. Common
colors are clear, white, gray, purple, yellow,
brown, black, pink, green, red.
colorless (harder than the streak plate)
A map showing the distribution of rock units and
structures across a region representation,
usually on a plane surface is termed a geological
A map showing the occurrence of structural
features across a region, the d