Bits and pieces of rocks clumped together are called sediments.

Here's a breakdown:

* Rock: A solid, naturally occurring mineral or mineraloid.

* Sediment: Fragments of rock, minerals, or organic matter that have been broken down by weathering and erosion.

* Sedimentary Rock: Rocks formed from sediments that are compacted and cemented together over time.

So, those bits and pieces of rock are the building blocks of sedimentary rocks!