- How are sediments classified by origin? Sediments are classified by origin into four categories: lithogenous, biogenous, hydrogenous and cosmogenous.
- What are the characteristics and relative abundance of sediments based on their classification by origin?
- Scientists learn a great deal by classifying sediments based on where they originate.
- Biogenous sediment-sediment that originates from life, consisting of primarily shells and hard skeleton.
- Calcareous- calcium carbonate containing.
- Cosmogenous sediments-sediment that originates from outer space.
- Hydrogenous sediment-sediment that originates from chemical reactions in seawater.
- Lithogenous sediments-(also known as terrigenous sediments) sediment that originates on land, primarily through erosion carrying particles into the sea.
- Meteor-materials entering the Earth's atmosphere from space.
- Meteorite-a meteor that strikes the ground.
- Microtektites-glass particles that form when a large meteorite impacts the Earth.
- Siliceous-silicon containing.
END OF READING!
1. Sediments that originate from organisms are called:
A. Lithogenous B. Biogenous C. Hydrogenous D. Cosmogenous
Summary & Current Research:
Sediment Sizes
- How are sediments classified by size?
- How do sediment grain size and current velocity affect the erosion and deposition of sediments?
- When scientists and engineers need to study how water motion affects sediments, origin is less important than size.
END OF READING!
1. Sediments are classified by size based on the:
A. Weight of an individual particle B. the diameter of an individual particle.
Summary and Current Research:
Visuals :)
2. Because it is a small but non-cohesive particle, sand is the most easily eroded sediment.
True or False
2. ___________ include sand and clay. These sediments __________.
A. Lithogenous sediments, cover the most sea bottom.
B. Biogenous sediments, cover most the sea bottom.
C. Lithogenous sediments, are the most abundant by volume
D. Biogenous sediments, are the most abundant by volume.
