Shale can result from the process of compaction alone.
Igneous rock.
igneous rock
The hardened layer of lava is called "igneous rock".
Rocks formed from hot molten rock that has coold and hardened are called what?
Hardened lava is considered igneous rock, composed of minerals.
weathering
Igneous rock comes from lava that has cooled and hardened.
A sedimentary rock
Extrusive igneous rock.
A hardened layer of magma is called a lava flow or volcanic rock.
A sedimentary rock is formed by the gradual and contineous accumulation, stratification, compactation, sedimentation, cementation, and lithification of transported and deposited debrises, detrituses, regoliths and other earths disintegrated materials, over a long period of time.
Igneous rock is formed from lava that has cooled and, of course, hardened.