Geology.
Rocks in the sea are typically referred to as sea rocks or underwater rocks. They can also be called submerged rocks or marine rocks.
They are called clastic sedimentary rocks.
Sam Boggs has written: 'Petrology of sedimentary rocks' -- subject(s): Sedimentary Rocks 'Petrology of sedimentary rocks' -- subject(s): Rocks, Sedimentary, Sedimentary Rocks
Metamorphic rocks may be formed.
Metamorphic Rocks
Frank Rutley has written: 'Granites and greenstones' -- subject(s): Igneous Rocks 'The study of rocks' -- subject(s): Analysis, Petrology, Rocks 'The eruptive rocks of Brent Tor and its neigbourhood' -- subject(s): Petrology, Igneous Rocks 'Granites and Greenstones: A Series of Tables and Notes for Students of Petrology' 'Elements of mineralogy' -- subject(s): Mineralogy
Scientists who study rocks are called petrologists.
because they are
Sedimentary rocks.
Igneous rocks
Perhaps "banded rocks"...
Changed rocks are called metamorphic. Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, through the use of heat and pressure.Metamorphic rocks