Answer:
geomagnetic field.
Explanation:
The earth magnetic field can be likened to a bar magnet with a North and South pole. It originates from the movement of molten iron and nickel in the outer core.
At every point in time, the magnetic field orientation can change. We must note that the magnetic north lies close to that of geographic north axis of the earth.
Around the mid-oceanic ridges, new materials are brought to the surface. These new materials can contain magnetic minerals such as haematite which are capable of being magnetized as a result of the prevalent magnetic field of the earth. As different materials are brought up, the magnetic minerals preserves the details of the magnetic field at that point in time. Using this information can know the orientation of the magnetic field at any point in time if the magnetic history chart of the earth is constructed. Oceanic ridges becomes older as they move away from the divergent margins.
Not completely sure but logically people go to cities to find jobs :) hope this helps
13,000 different types of work, from 1938 to the late 1990s..... i think
It has been accreated and developed in it's core it is retianed
Answer:
batholiths, d ikes, sills, and laccoliths
Explanation:
The plutons represent type of igneous intrusive rock formations. The word brings in some confusion as it is used differently around the world, but the general meaning of the word is that it represents a non-tabular intrusive body.
The plutons are often divided into four basic types:
- batholiths
- d ikes
- sills
- laccoliths
All of the plutons are forming deep into the ground. The magma cools off slowly into the crust and it forms a particular intrusive igneous formation. The laccoliths have the shape of a lens. The d ikes are pipe like and vertical. The sills are linear and horizontal. The batholiths are enormous and they lie below the other plutons, being the basis for them.
