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Transcript of Marine Modeling
The marine modeling is the action of the kinetic energy of the rocks and the chemical energy of the waves (marine water).
EXTERNAL & erosive
GEOLOGICAL ACTION OF THE SEa
A cliff is a mass of rock that rises very high and is almost vertical. Cliffs are very common landscape features. In cliffs there's a setback if it's a hard land or a landslide if it's a soft land.
A beach is a narrow peace of land that is located at the edge of an ocean, lake, or river. Materials like sand, pebbles, rocks, and shell fragments cover beaches.
ISLET OR ISLAND
The waves are water masses with a wavy motion, provoked by the action of the wind.
When it reaches the coast, the wave base shocks with the sea bottom, and the wave crest is automatically projected forwards. Then the rock breaks the wave.
There are 2 erosive processes:
The Cliff Setback
The grinding and washing of the materials. (shells, rocks...)
Tides are produced by the attraction between the moon, the Earth and the sun.
They are regular and periodic movements caused by the ascents and decreases of the sea level.
Today we study...
Ocean currents are driven by wind, water density differences, and tides. They describe the movement of water from one location to another.
Oceanic currents are driven by: the rise and fall of the tides, wind and thermohaline circulation.
Currents affect the Earth's climate by driving warm water from the Equator and cold water from the poles around the Earth.
What is thermohaline circulation?
This is a process driven by density differences in water due to temperature (thermo) and salinity (haline) variations in different parts of the ocean.
A bay is a body of water partially surrounded by land. A bay is usually smaller than a gulf. The mouth of it is typically wider than that of a gulf.
Weathering happens when natural events, like wind or rain, break up pieces of rock. In coastal areas, strong winds and powerful waves break off soft or grainy rocks from hardier rocks.
The Bay of Bengal is the largest bay in the world.
Rock which occurs at any given place on the earth is called that location's bedrock. In some cases the bedrock is actually exposed, and is said to outcrop at the surface.
It allows geologist to determine the local geology, and helps them put together the geologic history of the earth.
Headlands are characterized by high, breaking waves, rocky shores, intense erosion, and steep sea cliffs.
It's a point of land, usually high and with a sheer drop, extending out into a body of water. It's bordered of water except in one part.
Both are surrounded by water.
Small islands such as emergent land features on atolls.
Greenland is the world's largest island, while Australia, the world's smallest continent, but there is no standard of size which distinguishes islands from continents, or from islets.
Continents sit on continental lithosphere.
Oceanic crust is also part of tectonic plates, but it is denser than continental lithosphere, so it floats low on the mantle.
Difference between islands and continents
A tract of land completely surrounded by water, and not large enough to be called a continent.
Durdle Door and Stair Hole near Lulworth Cove on the Dorset Jurassic Coast in south England, although these are on an area of concordant coastline. When Stair Hole eventually collapses, it will form a cove.
Is a natural rock formation where a rock arch forms, with an opening underneath. Usually formed by erosion. But they can be formed in other landscapes without water.
Abyssal plains are completely flat areas of the ocean floor.
These are some of the least explored .
The abyssal plains cover approximately 40% of the seafloor and reach depths of between 2,200 and 5,500 meters.
SALINAS DE CABO DE GATA
Is an underwater mountain system formed by tectonic plates. It consists of various mountains joined in chains, typically having a valley known as a rift running along its spine.
Guyots are flat topped seamounts that have sank into deeper, colder water where carbonate material accumulates. They're isolated submarine volcanic mountains with a flat summit.
It's the seaward border of the continental shelf. The world’s combined continental slope has a total length of approximately 300,000 km.
They're small mountains formed on the sea floor because of the movement of ocean plates.
Bedrock is a consolidated rock underlying the surface of a terrestrial planet, usually the Earth. Above the bedrock is usually an area of broken and weathered unconsolidated rock in the basal subsoil.
They are usually between the bottom of the continental shelf and the oceanic ridge.
They are usually near submarine canyons
Submarine canyons are any of a class of narrow steep-sided valleys that cut into continental slopes and continental rises of the oceans.
Depth: 200m bellow sea level
Submarine canyons top
A delta is a land formed by comprised sediments found at the mouth of the river.
They are used to divide the oceans and some seas.
A delta can only be formed when river channels carry sediments into another body of water.
An estuary is a partly enclosed coastal body of water in which river water is mixed with seawater.
4 BASIC TYPES
NOW YOU KNOW Everything ABOUT MARINE MODELING!
When the mouth of a river flows directly into salt water
The salt water is mixed upward and fresh water is mixed downward
San Francisco Bay
The salinity is the same at the top to than at the bottom and decreases from the ocean to the river.
Deep elongated basin and a barrier that separates the basin from the sea.
It's called like that because the sediment land mass develop, at the river mouth, a triangular shape that looks like the Greek letter delta.
It's the relatively surface that extends from the outer edge of a continental shelf down to the continental rise.
BAHÍA DE ROSAS
DELTA DEL EBRE
Enjoying a few days in Spain....
Bay of Bengal
of the Sea
Today we're going to explain you a lot of fantastic things about marine modeling. As you know we recently have studied some things about weathering. To get into it, we will repeat you some basic concepts and some vocabulary to make you easy to understand our presentation.
We hope you'll enjoy it and surely
you'll learn a lot about this topic!
PAY ATTENTION & LEAVE THE QUESTIONS FOR THE END PLEASE!
We chose the marine modeling because we thought that the sea action repercussion was an interesting topic to talk about.
We have enjoyed a lot researching for this project. We thing it's a better way to study and learn new things. we learn more things because in internt there's more information and here is an example of this way to study.