What are some sediment rocks?

Answer 1

Different sedimentary rocks are, Chalk, Clay, Limestone, Millstone grit, Sandstone, and coal.

They are all found in geological ridges in South East England.

Sedimentary means that they were laid down by say river / sea beds and over geoloical time has more sediment places over them and compressed into rock.

The two other major rock forms are Igneous and Metamorphic.

Igneous rock is lava speyed out by volcanoes allowed to cool and form crystalline solids, such as basalt or granite.

Metamorphic Rock is sedimentary rock that has been subjecto geoligical heat and pressure, such as Schists , Gneiss, and Marble.

Answer 2

There are organic rocks, like Limestone, and clastic (composed of fragments), like Sandstone. Within these groups there are others, like coal is organic and siltstone is clastic, but even within limestone and sandstone, there are further categories. There's oolitic limestone, chalk and 'shelly' limestones; and arkose, desert sandstone, orthoquartzite (generic sandstone), and others. Conglomerate is an interesting one, if you are after a rock that is not 'normal'.