Download Where is bedrock found?

Land Resources/Human Impact
of Land Resources
What is bedrock?
Parent Rock consisting of
solid rock, and may have
limestone, granite,
marble, or other rocks
that can be mined in
quarries.
Where is
bedrock
found?
Under the C
Horizon
How is bedrock
extracted?
Slabs of bedrock
are often cut from
quarry faces
How is bedrock useful
to man?
Used in construction
of buildings,
monuments, flooring,
and fireplaces
How is the land in
the United States
being protected?
They are federal
administered to protect
timber, grazing areas,
minerals, and energy
resources.
Also National Park
Systems preserves special
landforms and species of
organisms.
List several Land
Resources.
*Soil
*Bedrock
*Aggregates
(Mixture of gravel, sand,
and crushed stones that
naturally accumulates on or
near the Earth’s surface.
Some found in floodplains of
river valleys and in alluvial
fans found in mountainous
areas. Some deposits of
glacial activity in moraines,
eskers, kames, and outwash
plains, even erratics from
glaciers.) –Used in construction and building of
*Ores
*Clay-used for making bricks,
china, ceramics, tiles, and
pottery
*Salt
*Gypsum-makes plaster
*Talc-makes baby powder and
cosmetics
*Graphite-lubricants and
pencils
State several ways how man
is destructing our land
resources.

#1Surface Mining
 For iron, bauxite (aluminum
ore), copper, coal and gold
 Extracted by removing huge
amounts of overlaying soil and
rock, in do so it completely
changes the landscape
#2 Underground Mining-(also called
subsurface mining)
Less disruptive to Earth’s surface
than surface mining
Problems-Unless Hold ponds are
built (which can leak too) Rain
goes through these piles of waste
and can dissolve and become
toxic metals that go into nearby
streams and rivers causing water
pollution.
#3 Agriculture
A.) Monoculture-fungus or
parasites kill one crop a lot
faster than when several
crops are in an area.
B.) Pesticides-boosts food
production but kills the good
organisms as well as the bad
ones. Also, insects build up
resistance against pesticides
so the farmers have to
increase the strength of the
pesticides. Also pollutes the
groundwater and surface
water and land itself.
C.) Topsoil-take 1000’s of
years to form so it is hard to
replace, Erosion occurs when
the land is cleared of forest or
grasslands for the 1st time.
Nitrogen cycle is disturbed
too.
#4Deforestation
#5Urban Development
Waste disposal problems need
to be fixed
Wetland destroyed and must
be build elsewhere
Bioremediation is helpful way
to clean up toxic waste:
Organisms are used to clean it
up because they eat it.
The End