Section 6.3Sedimentary Rock

Please write down the information that is in BLUE

Formation of Sedimentary Rock

Sedimentary rocks are formed by

weathering and erosion of other rock. Over

time that rock is deposited in new locations.

Those sediments are compacted and

cemented together.

3 types of sedimentary rock

1. Clastic rock

2. Chemical rock

3. Organic rock

Clastic rock

Rock that is formed from fragments of other

rock

Examples:

Sand and Gravel – Conglomerate

Sand – Sandstone

Silt and Clay – Shale

Quartz Conglomerate

Sandstone

Shale

Chemical rock

Dissolved minerals precipitate out of watersolutions and harden.Examples:Water evaporating – rock salt, gypsum, and

limestone

Minerals fall out of solution into the bottomof the ocean – limestone

Limestone

Organic rock

Sedimentary rock that consists plant and

animal remains.

Examples:

Limestone, coal, coral, and shell fragments

that have been glued together.

Coquina

Coral

Coal

Stratification

The layering of different sedimentary rock

types over time.

Minerals are usually deposited in low spots.

Over time the surrounding rock is weathered

away leaving the sedimentary rock behind.

Grand Canyon

Badlands

Fossils

The remains, impressions, or other evidence

of plant and animal life.

Examples:

The bones of an animal, leaf imprint, animal

tracks, and even fossilized fecal matter.

T Rex

Leaf

Ammonite

Mosquito

Amphibian Tracks

Dinosaur eggs

Fossil Poop

Ripple marks and Mud cracks

Ripple marks

patterns caused by the action of wind, water, and ocean currents

Mud cracks

When fossilized matter is left behind when mud dries and hardens into shale.

(a puddle)

Nodules, Concretions, and Geodes

Nodules – lumps of fine grained silicate matter.

Concretions – round solid masses of calcium carbonate.

Geodes – hollowed out spheres containing crystallized limestone on the inside.

Geode

Geode