Grains i think
Those are called sediments. It is any sort of loose rocks and mineral fragments that are deposited in layers. They can either be transported by water, wind, ice, or gravity.
GranitesDioritesGabbrosPegmatitesDykesSillsLayered Igneous intrusions
Aquifer.
You call a big rock that is more outgoing than other rocks a bo(u)lder.
The movement of fragments of rock by water, wind, or ice is called erosion. It is a natural process that helps shape the Earth's surface over time by wearing down rocks and transporting the resulting sediments to new locations.
rocks
GENES
Inside volcanoes, there is a mixture of molten rock (magma), gases, and solid rock fragments (pyroclasts). This combination builds up pressure beneath the surface until it is eventually released through an eruption.
Pieces, possibly shards, possibly fragments.
Smaller rocks.
You call a big rock that is more outgoing than other rocks a bo(u)lder.
A big rock that is larger than most rocks is often referred to as a "boulder." Boulders are typically defined as rock fragments that are larger than 256 millimeters (about 10 inches) in diameter. They can be found in various natural settings and are often shaped by geological processes over time.