stone henge
A single 'piece' of sand is called a 'grain'.
I think the right word is outcrop. When taken collectively, outcroppings.
Conglomerates are among the group called clasticsedimentary rocks, those that are formed of cemented particles of other rock particles.
the rocks but a group of kangaroos are called a gang
sedimentary rocks
It is called a suite of rocks.
yes no
A group of mussels collectively are called shellfish, clams, bivalves and unionids.
An individual layer is a stratum; a group of layers is referred to as strata.
Rock salt and rock gypsum are common examples of a group of chemical sedimentary rocks called evaporities. When a sedimentary rock consists of angular, grave sized particles is breccia.
I don't think you can count rocks.
Lichens is the group of fungus that is found growing on rocks.