Shaft Coal Mining Rock or Mineral.pdfIt’s the solid crust and solid mantle near Earth’s surface...
Transcript of Shaft Coal Mining Rock or Mineral.pdfIt’s the solid crust and solid mantle near Earth’s surface...
Geology Tells Earth’s History
Rocks and minerals are the natural
resources that supply our everyday
needs!
Rocks and minerals tell the physical
history of the Earth and its life history.
MINERAL IGNEOUS ROCK
SEDIMENTARY ROCK METAMORPHIC ROCK
Review - Where do we find
them in NYS?
New - How old are they?
atmosphere,
hydrosphere,
biosphere
asthenosphere?
lithosphere? LITHO = SOLID
HYDRO = WATER
ATMO = GAS
BIO = LIVING
ASTHENO =
“PLASTIC” MANTLE
Use your
ESRT to
locate the
lithosphere.
It’s the solid crust
and solid mantle
near Earth’s
surface where
rocks and
minerals are
found!
In your
notebooks,
draw a
conceptual
model of these
layers and their
depths
What does that tell you about the composition of most
rocks and minerals?
Here are the clues in the rocks and minerals we will use to identify them and piece together the history of Earth
COMPOSITION (CONTENTS)
TEXTURE (FEATURES)
STRUCTURE (PATTERNS)
What the rock or
mineral is made of
The appearance of
a rock or mineral
The patterns you see in a
rock or mineral caused by
how it formed
MINERAL IGNEOUS ROCK
SEDIMENTARY ROCK METAMORPHIC ROCK
… naturally occurring or synthetic (man-made)?
… organic (once living) or inorganic (non-living)?
… crystalline solid, liquid or gas?
… one (unique) or multiple (variable) chemical composition(s)?
MINERALS are the building blocks of rocks!
MINERAL
Naturally occurring Inorganic Crystalline solid Unique chemical
composition (look like one material)
Minerals are building blocks of rocks
IGNEOUS ROCK
SEDIMENTARY ROCK METAMORPHIC ROCK
MINERAL IGNEOUS ROCK
• Formed from melting of other rocksinto molten magma
• Magma cooled and solidifiedTEXTURE
• Interlocking crystals in random pattern
• Fine to very coarse crystals• Glassy (no crystals)• May have gas pockets (vesicular)
SEDIMENTARY ROCK METAMORPHIC ROCK
WHICH
SAMPLE IS A
SEDIMENTARY
ROCK?
MINERAL IGNEOUS ROCK
SEDIMENTARY ROCK• Other rocks broken down into
sediments of same or mixture of sizes• Sediments cemented back together
TEXTURE • Grains are not interlocking. They are
cemented back together (two materials)• Fossils• Flat layers because they formed mostly
on ocean floor)• Muddy looking if small silt/clay
particle sizes
METAMORPHIC ROCK
What’s the
PATHWAY TO
METAMORPHIC
ROCKS!
MINERAL IGNEOUS ROCK
SEDIMENTARY ROCK METAMORPHIC ROCK• Formed from extreme heat and pressure
of other rocks, but not enough heat to melt original material
TEXTURE • Interlocking crystals• Pressure can deform layers and fossils
(appear stretched out or squished)• Layers discontinuous and can be wavy• Platey minerals (shiny flat plates)
Let’s use observation clues to decide if a
sample is a rock or a mineral
IGNEOUS ROCK
Color(s):
Observation:
METEMORPHIC ROCK
Color(s):
Observation:
SEDIMENTARY ROCK
Color(s):
Observation:
MINERAL #1
Color(s):
Observation:
MINERAL #2
Color(s):
Observation:
MINERAL IGNEOUS ROCK
SEDIMENTARY ROCK METAMORPHIC ROCK
Solid, liquid or gas?
Unique or variable composition?
◦Made of many things in different proportions likeinorganic minerals
organic materials (shells, dead plants)
other rocks in various proportions.
Crystal Cave was undisturbed for 600,000 years and then humans disturbed the balance
Water was drained because of nearby mining of gypsum (drywall main ingredient)
The cave was discovered when it was drained
Will the crystals survive?