Sedimentary Rocks A. Form from Sediments

Which are pieces of solid material that have been weathered & deposited on the earth’s surface by wind, water, and or ice from other rocks.

Created from the process of cementation & compaction of sedimentsform in flat layers called strata fossils are found in sedimentary rocks.Show ripple marks and mud cracksSoft rocks

1.   Sediment shape indicate the environment of formation.a.   Angular: Windy & Dry Climate b.  Rounded: Warm and Moist Climate

B. Types of Clastic Rocks

Identified by grain size:

1. Conglomerate: Round sediments 2. Sandstone: Fine to Coarse Sized Grains 3. Siltstone: Very Fine Grain Sizes 4. Shale: Made from clay / colloidal suspensions

Non-Visible Grains

C. Crystalline (Chemical)

1. Form when sea water evaporates in which dissolved minerals in the water precipitate (fall out) of solution.

Gypsum Salt Dolostone  Limestone

Limestone: Skeletal remains of marine animals  Chalk: Microscopic skeletal remains Coal: forms from decaying plants

1. Peat2. Lignite3. Bituminous

2. Bioclastic (Organic) - created from the remains of partially decayed plant and animal matter.

Fragmental Rocks

Conglomerate and Breccia

Bioclastic

limestone

Crystilline Chemical

Gypsum

Rock Cycle Song (Sing to the tune of "Row, Row, Row Your Boat")

SEDIMENTARY rock Has been formed in layers Often found near water sources With fossils from decayers

Then there's IGNEOUS rock Here since Earth was born Molten Lava, cooled and hardened That's how it is formed

These two types of rocks Can also be transformed With pressure, heat and chemicals METAMORPHIC rock is born.

( Don't forget to sing this as a "Round"; after all, it is the Rock "Cycle"! )