Geology: Rock Cycle

The rock cycle is an illustration that explains how the three rock types are related to each other, and how processes change from one type to another over time.

It describes the dynamic transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous.

Each type of rock is altered or destroyed when it is forced out of its conditions.

An igneous rock such as basalt may break down and dissolve when exposed to the atmosphere (water, temperature, pressure, wind) or melt as it is forced by fault lines to go under a continent.

Due to the driving forces of the rock cycle, plate tectonics and the water cycle, rocks do not remain in stable balance / equilibrium and are forced to change as they encounter new environments.

A diamond is a mineral from within an igneous or metamorphic rock that formed at high temperature and pressure.

for image see source
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Source:  http://en.wikipedia.org/wiki/Rock_cycle

Why is the sea salty?

We have a great book called TELL ME WHY by Hamlyn. This is one of the questions it asked and we decided to have a better look into it and look at a few suggestions on the internet. I put all the info and some images into this powerpoint presentation and then converted it into PDF for upload to my scribd.com page.

Here it is:

You can view it here fullscreen or see it below:

http://www.scribd.com/full/35916754?access_key=key-2m3dzcnq8chm1tnxydru

Why is the Sea Salty