We learnt about the some of characteristics of the...
- Igneous rocks
- Sedimentary rocks
- Metamorphic rocks
We did the sedimentary rocks in more detail.
- Some examples of sedimentary rocks are conglomerate, limestone and shale.
- They have very obvious layers.
- They are broken down very easily, especially limestone.
- The sedimentary rock covers of the continents of the Earth's crust is extensive, but the total contribution of sedimentary rocks is estimated to be only 5% of the total volume of the crust, much less then the igneous rocks and the metamorphic rocks.
- Sedimentary rocks are deposited in layers as strata, forming a structure called bedding.
How are the Sedimentary Rocks formed?
The sediments are deposited and they pile up in layers, with the weight of more layers piling up, the sediments will cament together and harden, forming the sedimentary rock.
I find this website diificult to understand as it is very profound. They call it a 'A Basic Sedimentary Rock Classification' but i dont understand it. But still, its about sedimentary rocks:) You can visit it if you have the time: http://csmres.jmu.edu/geollab/fichter/SedRx/sedclass.html
Some pictures of Sedimentary rocks:):)