CLASSIFICATION OF Use with Chapter 6 Section 6.2

Section 6.2. Chapter 6 ... Name the three types of sedimentary rocks. _____ 2. What is the most common sedimentary rock, and what is its method of...

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MASTER 14

Teaching Transparency

CLASSIFICATION OF SEDIMENTARY ROCKS

Use with Chapter 6 Section 6.2

Classification of Sedimentary Rocks Classification Clastic

Biochemical

Chemical

Texture/Grain Size coarse (> 2 mm)

Composition Fragments of any rock type — quartz chert and quartzite common

rounded angular

Rock Name conglomerate breccia

medium (1/16 mm to 2 mm)

quartz and rock fragments quartz, k-spar and rock fragments

sandstone arkose

fine (1/256 mm – 1/16 mm)

quartz and clay

siltstone

very fine (<1/256 mm)

quartz and clay

shale

microcrystalline with conchoidal fracture

calcite (CaCO3)

micrite

abundant fossils in micrite matrix

calcite (CaCO3)

fossiliferous limestone

oolites (small spheres of calcium carbonate)

calcite (CaCO3)

oolitic limestone

shells and shell fragments loosely cemented

calcite (CaCO3)

coquina

microscopic shells and clay

calcite (CaCO3)

chalk

variously sized fragments

highly altered plant remains, some plant fossils

coal

fine to coarsely crystalline

calcite (CaCO3)

crystalline limestone

fine to coarsely crystalline

dolomite (Ca, Mg) CO3 (will effervesce if powdered)

dolostone

very finely crystalline

quartz (SiO2) — light colored —dark colored

chert flint

fine to coarsely crystalline

gypsum (CaSO4  2H2O)

rock gypsum

fine to coarsely crystalline

halite (NaCI)

rock salt

Chapter 6  Sedimentary and Metamorphic Rocks

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Date _____________________________ Period _____________________________ Name _____________________________

WORKSHEET 14

Teaching Transparency

CLASSIFICATION OF SEDIMENTARY ROCKS 1. Name the three types of sedimentary rocks.

Use with Chapter 6 Section 6.2

____________________________________________________________________________________ 2. What is the most common sedimentary rock, and what is its method of formation? ____________________________________________________________________________________ ____________________________________________________________________________________ 3. How are clastic sedimentary rocks classified? ____________________________________________________________________________________ 4. Compare and contrast conglomerate with breccia. ____________________________________________________________________________________ ____________________________________________________________________________________ 5. How do chemical sedimentary rocks form? ____________________________________________________________________________________ ____________________________________________________________________________________ 6. Name three common evaporite minerals. ____________________________________________________________________________________ 7. How do organic sedimentary rocks form? ____________________________________________________________________________________ ____________________________________________________________________________________ 8. Name two organic sedimentary rocks. ______________________________________________________________________________

Chapter 6  Sedimentary and Metamorphic Rocks

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Teacher Guide and Answers Teaching Transparency 14 – Classification of Sedimentary Rocks 1. clastic, organic, and chemical 2. Clastic sedimentary rock is the most common type, and it forms from the lithification of clastic sediments. 3. Clastic sedimentary rocks are classified according to grain size. 4. Both are coarse-grained sedimentary rocks. A conglomerate is composed of rounded particles, while a breccia contains angular particles. 5. Chemical sedimentary rocks form from the precipitation of dissolved minerals in water. 6. calcite, halite, and gypsum 7. Organic sedimentary rocks form from the accumulation and lithification of the remains of once-living things. 8. limestone and coal

Unit 2  Teacher Guide and Answers

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