Since the shells of mollusks are composed of calcium carbonate (limestone), the likelihood of the surrounding rocks being limestone too would be very high, due to the shells of dead mollusks.
Extrusive igneous rocks are one type of rocks that can be formed above the ground. Sedimentary rocks can also be formed above the ground.
Igneous
Clastic Sedimentary Rocks.
sedimentary rocks
Extrusive igneous rocks.
volcanic rocks
Extrusive igneous rocks
The type of rock formed by cooling of Magma or Lava is Igneous
METAMORPHIC
Biogenic.
Volcanic activity can form igneous rocks, such as basalt or andesite. These rocks are formed from the solidification of magma or lava ejected from a volcano.
Clastic sedimentary rocks are composed of particles of weathered and eroded or fragmented in situ rocks of varying mineralogy.