Essential Aspects of Cross Bedding Examples
Cross bedding is a sedimentary structure that occurs when layers of sediment are deposited at an angle to the underlying layers. This can occur when sediment is deposited by a current, such as a river or wind, or when it is deposited by a mass movement, such as a landslide.
Cross bedding can be used to determine the direction of the current or the mass movement that deposited the sediment. It can also be used to determine the relative age of different layers of sediment.
Types of Cross Bedding
There are many different types of cross bedding, but the most common include:
- Trough cross bedding - This type of cross bedding is formed when a current erodes a trough into the underlying sediment and then fills the trough with new sediment.
- Tabular cross bedding - This type of cross bedding is formed when a current deposits sediment in a series of parallel layers.
- Hummocky cross bedding - This type of cross bedding is formed when a current deposits sediment in a series of small, rounded mounds.
Examples of Cross Bedding
Cross bedding can be found in a variety of sedimentary environments, including rivers, deltas, beaches, and deserts. Some common examples of cross bedding include:
- Sandstone - Sandstone is a sedimentary rock that is formed from the accumulation of sand grains. Cross bedding is often found in sandstone, especially in deposits that were formed by rivers or deltas.
- Limestone - Limestone is a sedimentary rock that is formed from the accumulation of calcium carbonate. Cross bedding is often found in limestone, especially in deposits that were formed by marine currents.
- Coal - Coal is a sedimentary rock that is formed from the accumulation of plant material. Cross bedding is sometimes found in coal, especially in deposits that were formed by swamps or deltas.
Importance of Cross Bedding
Cross bedding is an important sedimentary structure because it can provide information about the environment in which the sediment was deposited. It can also be used to determine the direction of the current or the mass movement that deposited the sediment.
Cross bedding is a valuable tool for geologists and other scientists who study the Earth's history.
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