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Sedimentary Rocks

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The fossil is large (a snail shell). The most likely Type of SRock is... (one could also say burial, but since deposition is continues, burial is implied) ... – PowerPoint PPT presentation

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Title: Sedimentary Rocks


1
Sedimentary Rocks
JEOPARDY
With special hosts You !!! (and your friendly
teacher)
2
The Board
3
Wild Rock 100
  • (Name the S.Rock) Type- Clastic, mostly
    coarse-grained particles (grains) with rounded
    edges.
  • Answer- What is, a Conglomerate.
  • Return to game board

4
Wild Rock 200
  • (Name the S.Rock) Type- Chemical, formed from
    previously water-dissolved minerals Used in
    industry to make cement for construction.
  • Answer- What is, Limestone.
  • Return to game board

5
Wild Rock 300
  • A large sedimentary rock (50 cm across) has only
    1 fossil in it. The fossil is large (a snail
    shell). The most likely Type of SRock is
  • Answer- What is, a Clastic SRock. (Unlikely to be
    evaporite, and definitely not an organic rock if
    it only has 1 fossil regardless of size)
  • Return to game board

6
Wild Rock 400
  • The most common organic material in bituminous
    coal.
  • Answer- What is, materials from plants.
  • Return to game board

7
Wild Rock 500
  • (Choose Easily / with difficulty) Granite (an
    igneous rock) weathers chemically(choose)
  • Answer- What is, very Easily. (chemical bonds
    among particles are weak, after dissolved,
    particles break off)
  • Return to game board

8
Composition 100
  • Type of SRocks classified on the basis of the
    kind of materials precipitated.
  • Answer- What is, chemical SRocks.
  • Return to game board

9
Composition 200
  • The cement in a SRock has a chemical
    composition that includes Fe2O3. The iron oxide
    came from ______________ and cemented the
    clastic particles.
  • Answer- What is, dissolved iron oxide
    precipitated out of groundwater.
  • Return to game board

10
Composition 300
  • (Name the rock). Biochemical (organic) SRock
    composed mainly of loosely cemented, large,
    easily seen shell fragments.
  • Answer- What is, COQUINA.
  • Return to game board

11
Composition 400
  • The relative porosity of SRocks composed of very,
    very fine particles.
  • Answer- What is, VERY LOW POROSITY
  • Return to game board

12
Composition 500
  • About the composition of Shale (particle size,
    origin of particles).
  • Answer- What is, very small particles (the
    smallest), clastic origin.
  • Return to game board

13
About the particles 100
  • There are 2 types of limestones Crystalline
    limestone and fossiliferous limestone. Because of
    the origin of the particles, Crystalline
    limestone is classified as this type of SRock.
  • Answer- What is, Chemical SRock (particles have
    been weathered by chemical means). Fossiliferous
    limestone is an Organic SRock.
  • Return to game board

14
About the particles 200
  • The large particles that compose a particular
    clastic rock are most likely to have been
    transported by..
  • Answer- What is, erosion by water (stream) or
    even glacial ice. (generally wind moves smaller
    particles only)
  • Return to game board

15
About the particles 300
  • The maximum particle size that will cause clastic
    SRocks to be classified as made of Medium
    particles (such as sandstone) or Large particles
    (such as breccias and conglomerates).
  • Answer- What is, 2 mm
  • Return to game board

16
About the particles 500
  • A composition of large particles, regardless of
    their origin will result in this level of
    porosity.
  • Answer- What is, High Porosity.
  • Return to game board

17
About the particles 400
  • A graded-bedding results when particle deposition
    has followed this pattern.
  • Answer- What is, when coarser/heavier particles
    have deposited first, followed by progressively
    finer/lighter particles.
  • Return to game board

18
Weathering Erosion 100
  • If major metamorphic processes have not occurred
    in a particular region, the most likely type of
    rocks that are weathered/eroded as source of
    materials for SRocks at such place are..
  • Answer- What are, igneous rocks, specifically
    those formed from lava.
  • Return to game board

19
Weathering Erosion 200
  • Weathering and erosion usually contribute to
    damage and destroy fossils that are close to the
    surface. A process that usually contributes to
    protect these fossils is.
  • Answer- What is, burial under fine particles.
  • Return to game board

20
Weathering Erosion 400
  • The steps involved in SRock formation
  • Answer- What are, weathering/erosion, deposition,
    compaction, lithification.
  • (one could also say burial, but since deposition
    is continues, burial is implied)
  • Return to game board

21
Weathering Erosion 500
  • A sedimentary formation in which
    erosion/deposition have resulted in the formation
    of inclined layers is said to have a certain type
    of bedding.
  • Answer- What is, cross bedding.
  • Return to game board

22
Weathering Erosion 300
  • The angular edges of large particles in breccias
    (a clastic SRock) suggest this type of erosional
    force.
  • Answer- What is, Particles were transported only
    a short distance. Most likely a landslide (not
    underwater), or a flash flood, and subsequent
    deposition of additional finer particles.
  • Return to game board

23
Definitions 300
  • Calcite
  • Answer- What is, Chemical SRock made of CaCO3
    (calcium carbonate).
  • Also, the cement around certain SRocks.
  • Return to game board

24
Definitions 400
  • Evaporites
  • Answer- What are, Chemical SRocks made when
    minerals dissolved in water crystallized after
    water evaporated.
  • Return to game board

25
Definitions 500
  • Chalk (in geology, not in old classrooms)
  • Answer- What is, a white, soft organic SRock
    made almost entirely of the hard parts of
    microscopic ancient microorganisms.
  • Return to game board

26
Definitions 200
  • Halites
  • Answer- What are, Chemical SRocks made of NaCl
    (Halites are also called rock salt)
  • Return to game board

27
Definitions 100
  • The other name for a type of SRock is detrital.
    Say the other name and define detritus.
  • Answer- What are, Clastic SRocks. Detritus is
    used to describe the particles that are weathered
    off other rocks, such as igneous rocks (or any
    rock for that matter).
  • Return to game board

28
Wild Rock 300
  • Anthracite coal is a black metamorphic rock. The
    names of 2 types of coal that are sedimentary
    rocks are
  • Answer- What are, Lignite (soft, brown coal,
    moderate energy) and bituminous coal (hard, black
    coal, high energy)
  • Return to game board
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