Table of Contents Title: Types of Sedimentary Rocks Page #: 42 Date: 12/3/2012
Table of ContentsTitle: Types of Sedimentary
RocksPage #: 42
Date: 12/3/2012
Objective Students will be able to describe
the three types of sedimentary rocks.
Word of the Day Reservoir: Any place in which
water, liquid gas, or oil may be stored.
Types of Sedimentary Rocks
Clastic: Formed from loose sediments on Earth’s surface.
3 Categories:1. Coarse Grained: Gravel sized grain.
• Conglomerate - gravel sized, well rounded grains. Formed by fast flowing water.
• Breccia - large angular grains, particles. Not transported very far.
Conglomerate Breccia
Types of Sedimentary Rocks
Clastic: Formed from loose sediments on Earth’s surface.
3 Categories:2. Medium Grained: Sand sized grains.
• Example: Sandstone.• High porosity - lots of spaces between grains.
• Means rock may hold water, gas, oil - it’s a reservoir!
Sandstone - medium sized grains
Types of Sedimentary Rocks
Clastic: Formed from loose sediments on Earth’s surface.
3 Categories:3. Fine Grained - Silt and clay sized
particles.• Example: Shale - low porosity. Formed by
swaps and ponds - low currents = horizontal layering.
Limestone - fine grained
Types of Sedimentary Rocks
Chemical Sedimentary Rocks: Evaporites - formed when dissolved minerals precipitate out of solution.
Example: Salts
Rock Salt
Types of Sedimentary Rocks
Biochemical Sedimentary Rocks: Made from remains of animals.
Water animals use calcite for shells and die leaving remains.
Example: Calcium Carbonate = Limestone.
Classwork Is it sedimentary or Igneous?