How Sedimentary Rock Formed
Sedimentary rocks are formed by different pieces of things, called sediments, cementing themselves together to form a rock.
Three types of Sedimentary Rock
Clastic: Clastic rocks are made up of different particles from the other rocks these rocks could be igneous, metamorphic, or it could even be made up of other sedimentary rocks.
Example: Shale
Chemical: Chemical rocks are created by chemical reactions in water that is full of positive and negative atoms. These atoms are form bonds together while they crystalize.
Example: Micrite
Organic: Organic rocks are rocks that are made up of the harder parts of ancient plants and animals that have cemented themselves together over the centuries.
Example: Coal
Example: Shale
Chemical: Chemical rocks are created by chemical reactions in water that is full of positive and negative atoms. These atoms are form bonds together while they crystalize.
Example: Micrite
Organic: Organic rocks are rocks that are made up of the harder parts of ancient plants and animals that have cemented themselves together over the centuries.
Example: Coal
Ripple Marks
Ripple Marks at the bottom of Green Bay.
Mud Cracks
Mud Cracks
Four Features of Sedimentary Rocks.
1. Ripple Marks: Ripple marks are caused by currents and waves in the water while the sediments are being deposited.
2. Graded Bedding: Layers of rock where the coarser materials are at the bottom of the rock and the finer ones are at the top.
3. Mud Cracks: Polygonal patterns that are formed by the sediments drying and shrinking before it is buried.
4. Load Casts: Load casts happen when Sediment in deposited faster than it can compact.
2. Graded Bedding: Layers of rock where the coarser materials are at the bottom of the rock and the finer ones are at the top.
3. Mud Cracks: Polygonal patterns that are formed by the sediments drying and shrinking before it is buried.
4. Load Casts: Load casts happen when Sediment in deposited faster than it can compact.
How Limestone is Formed
Limestone forms in clear, warm, shallow waters. Limestone is formed out of shell, coral, algal, and fecal leftovers.