The type of clastic rock that forms from tiny particles of clay is called shale.

Here's why:

* Clastic rocks are formed from fragments of other rocks.

* Clay is a very fine-grained sediment, typically less than 0.0039 mm in size.

* Shale is a fine-grained sedimentary rock composed primarily of clay minerals.

While clay is the primary component, shale can also contain other minerals like quartz, feldspar, and mica. The specific minerals and their proportions influence the shale's properties and appearance.