The type of sedimentary rock that forms when sediments stick together is called clastic sedimentary rock.

Here's why:

* Clastic refers to the fact that the rock is made up of fragments (clasts) of other rocks.

* These fragments can range in size from tiny grains of sand to large pebbles or even boulders.

* Cementation is the process where minerals dissolved in groundwater precipitate between the sediment grains, acting like glue to bind them together.

Examples of clastic sedimentary rocks include:

* Sandstone: Made of sand-sized grains

* Conglomerate: Made of gravel-sized fragments

* Shale: Made of very fine-grained clay particles

Let me know if you'd like to learn more about any of these!