Wind, density difference in water masses which is caused by temp and salinity variations, gravity and an event like an earthquake.
Answer:
As Snail is a land species, they for about 2-3 years, based on there calcium carbonate shells it can be concluded that they form in tropics.
Explanation:
- When looking at the slabs or the plate from both the clockwise and counterclockwise, spiraled snails fossils are usually in the spiral forms and the bedrocks that may have collected their imprints from the sediments deposited in the geologic formation of the earth.
- The slabs of rock are hence evidence of the tropical climates and their creation is a due result of their shells that were deposited in the large tract of rocks when the uplifting of landmasses and the volcanic events take place.
- Geologists use carbon-14 dating technology of the rocks estimate that their formation which hence is impacted due to the climatic region dominating the tropical oceans and lands is suited to the formation of these small creatures that their existence on the calcium carbonates creates this evidence.
Constructive plate boundaries
1) Convection currents in the mantle move the plates
2) 2 plates of oceanic crust diverge/pull apart e.g. North American and Eurasian plates.
3)
The rising magma forces the ends of the plate to push up and buckle.
This creates tensional cracks on the underside of the plates.
4) Magma is squeezed into the gap between the two plates and is cooled by the ocean to form new, solidified rock/basalt.
5) Rising magma forces its way through the tensional cracks and forms sub-marine shield volcanoes on the ocean floor.
6)
With repeated eruptions over millions of years they can grow until
they break the surface of the ocean and become volcanic islands e.g.
Iceland.
<u>Answer:</u>
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I think iron sorry if I am wrong
