for us to know what really the reason why the continents spread apart
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WANT TO FIND THE TREASURE TOO?
How are we going to find the treasure?
Wait! Don’t be so excited we will come up on that later. I would like first to introduce to you the techniques in studying the seafloor.
Yeah. Lets find the treasure now!
Okay. okay I will listen to you coz I want to find the treasure !
We need first to study the sea floor, sounds good right?
Several devices collect sediment and rock directly
from the ocean floor. A rock dredgeis an open
mouthed steel net dragged along the sea floor
behind a research ship, The dredge breaks rocks
from a submarine outcrops and hauls them to
This is a rock dredge right?
Yeah! Very good!
Remember that sampling has a
Physical contact with the sea floor
can we use
Sampling in finding
Let me first finish my discussion,
are mounted on offshore platforms and on research vessel. The drill cuts cylindrical cores from the other sediment and rock which are then bought to the surface for study.
Oil Exploration, I like exploration
It will help me better, clue and guide if where are the treasure.
Other pirates who want to find the treasure too
Indirect contact with the ocean floor! I want to try it, and use to find the treasure!
Just watch and learn.
Let me guess, remote sensing do not require direct contact with the ocean floor.
Yeah. You are right!
TECHNOLOGIES USED IN REMOTE SENSING!!
☀it emits a sound signal from a research ship and then records thesignal after it bounceoff to the sea.
I think dolphins have sonar…
Works in the same way but uses a higher energy signal that penetrates and reflects from layers in sediment and rock. This gives a picture of the layering and structure of the oceanic crust as well as the sea floor topography.
Instruments that measures magnetic field.
☀Data collection by ship borne magnetometers resulted in the now famous magnetic stripes on the sea floor.
These are the reasons why ocean floor have different features and too wide.
The discovery of magnetic stripes rapidly led to the development of the sea floor spreading hypothesis and of the theory of the plate tectonics.
instruments have recently been used to measure subtle swells and depressions on the sea floor.
PAG-ASA and PHIVOLCS use satellite base microwave radar.
Scientists bare currently working on sensors and robots that will be able to monitor the oceans in real time . One project called ARGO,is a set of 3000 floating sensors distributed along the ocean to measure daily patterns of salinity and temperature a of an effort to determine the nature and pace of global climate change,..
I think I need to go before my competitors got the treasure.
Huh? You will going to leave me again.
We are now finish in the techniques in studying the seafloor
Slow Sea floor spreading creates a narrow , low volume ridge that
displaces less sea water and lower sea level while the rapid sea floor
spreading creates a wide, high volume ridge that displaces more sea
water and raises global sea level.