4 types of marine sediments

Four types of Marine Sediments and where they Derived From

  Lithogenous- Derived from land

Biogenous- derived from organisms

Hydrogenous or Authigenic- derived from water

Cosmogenous- derived from outer space

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Deep ocean trenches and island arcs

1. How and where do ocean treches form?
    These form at covergant plate boundaries when one plate i subducted beneath another
2. Describe an island arc?
     The arc shape results from the geometry of plate movement across the spherical earth, and the convex side of the arc points toward the ocean
3. What's the deepest trench in the world?
     Mariana Trench
4. What's trench does Japn lay next to?
      Japan Trench
5. Why do island arcs ARC?
      Since its subducting on a shere the converside is steeper so its forms on arc.
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1. What is Abyssal Plain?

An Abyssal Plain is an underwater plain on the deep floor

2. Where are AP found?

Found at depths between 3000 and 6000 meters. Also found between the edges of the continents and great underwater mountain ranges

3. What are the features of AP?

Thick layers of sediment covering most of these plains

4. How much of the earth do AP make up?

30 percent of the earths surface 

Adaptations of Sea Cave Creatures

Adaptations of Sea Cave Creatures



http://goo.gl/qlW6X

1. what are some typical adaptations for these animals, and why?

Lack of pigmentation, No eyes or their eyes are tiny, Development of sensory mechanisms to develop food and Predators.

2. why is oxygen not plentiful in caves, and how do creatures deal with the lack of oxygen?
No Photosynthesis , very limited water circulation in cave.

3. why do adaptations occur?
to provide an advantage to insure better survival of the organism.

hydrothermal vents 2-1-13

1. What exactly was described as "the biggest biological discovery on Earth?"
Hydrothermal vents in the depth of the ocean.
2. Where in the oceans was the discovery made?
250 ml off the coast of galpogos.
3. What was “interesting” about Tube Worms?
when you cut them they bleed like human blood substance.
4. How are species able to survive without sunlight? (What’s the process, if it’s not photosynthesis)
Kemosynthesis.
5. Where on Earth are hydrothermal vents located?
All around the earth.
6. Describe the theory of how life on Earth may have began at hydrothermal vents?

Essential Questions "See the Sea Floor"

1. NOAA: Who are they and what do they do? -NOAA is the National oceanic and atmospheric administration. They are creating a comprehensive map of the sea bed.

2. The Intensity of a sonar echo tells scientist what? -What the sea floor and water column look like, also differences and changes in each.

3. Why does an ROV assist scientist? - it allows scientist to better see the sea floor first hand, to better understand exactly what the characteristics are under the surface of the ocean.

4. Why are these studies important to society? -Because for the most part we do not know what lies beneath the surface of our oceans.

Uniformitarianism or Catastrophism vs. Plate tectonics

By Patricia Zapien and Jonathan Franco

Theories, Dates, People.

Uniformitarianism: 1830. assumption that the same natural laws and processes that operate in the universe now, have always operated in the universe in the past and apply everywhere in the universe

- the work of geologist James Hutton, which was refined by John Playfair and popularised by Charles Lyell's Principles of Geology 

Catastrophism: (19th century) the theory that the Earth has been affected in the past by sudden, short-lived, violent events, worldwide

-geologist Charles Lyell built upon James Hutton's ideas 

The theory of uniformitarianism is more closely related to the theory of plate tectonics

Uniformitarianism 

Catastrophism