The sediments on the lake bottom undergo lithification and become sedimentary rock. Further compaction, pressure, and heat turn it into metamorphic rock.
Sedimentary rock forms when sediments such as sand, silt, and clay settle to the bottom of rivers, lakes, and oceans. Over time, the layers of sediments are compressed and cemented together to form sedimentary rock.
Metamorphic rock is formed under high temperature and pressures which are not present on the surface. The erosion processes at the surface are low temperature and pressure, and aqueous, which more closely match the formation processes of sedimentary rock. Thus one can see the process of erosion as the undoing of the formative process. This better matches sedimentary than metamorphic.
This type of sedimentary rock is called a "nonconformity." It occurs when younger sedimentary layers are deposited on top of older, often deformed or eroded, igneous or metamorphic rocks. Nonconformities indicate a significant gap in the geological record due to erosion or tectonic activity.
As describe by the rock cycle, an igneous rock can undergo three types of changes. First, it can be weathered and then compacted into a sedimentary rock, such as obsidian weathered into shale. Next, an igneous rock can, through heat and pressure, be changed into a metamorphic rock. Granite, which is an igneous rock, can be metamorphosed into gneiss. Finally, an igneous rock can be be melted and then cooled into another igneous rock. For example granite, which results from relatively slow cooled magma in the Earth's crust, can be re-melted and rapidly cooled, turning it into obsidian.
Sedimentary rock, specifically mudstone or shale, is formed from the compaction and cementation of sediment that settles at the bottom of ponds and rivers. Over time, this process creates layers of sedimentary rock that retain characteristics of the original soil deposits.
Sedimentary rock forms when sediments such as sand, silt, and clay settle to the bottom of rivers, lakes, and oceans. Over time, the layers of sediments are compressed and cemented together to form sedimentary rock.
Protolith is a term used to describe the parent rock of a metamorphic rock. Conglomerate is a sedimentary rock that can be composed of clasts of sedimentary, igneous, or metamorphic rocks, or any number of combinations of all.
By exposure to heat and/or pressure through depth of burial, directed pressure, or proximity to a magma source. Existing minerals can recrystallize, non-hydrous minerals can replace hydrous minerals, new minerals can be formed from the introduction of new ions from heated solutions, and minerals can become flattened and aligned in parallel layers.
Metamorphic rock is formed under high temperature and pressures which are not present on the surface. The erosion processes at the surface are low temperature and pressure, and aqueous, which more closely match the formation processes of sedimentary rock. Thus one can see the process of erosion as the undoing of the formative process. This better matches sedimentary than metamorphic.
Sedimentary rocks are found generally at the bottom of an ocean as this is where eroded material falls. Igneous rocks are found near volcanoes as they are molten rock. Metamorphic rock can be found anywhere, as it is formed in the ground and slowly comes up to the surface (but it is made of igneous or sedimentary rocks.)
Sandstone---as exposed rock on the surface of the Earth in tectonically lifted former beach or deltaic deposits. Sedimentary rock---the majority of rock units on the surface of the Earth are sedimentary in nature.The keyword is 'surface'.
Limestone is typically the product of accumulated decomposed marine life as it settles to the bottom of a body of water.This sedimentary rock, laid down in earlier geological ages, is the starting material for marble.When limestone is exposed to geological pressure and heat, it changes (metamorphosizes) into marble.The metamorphic stone known as marble is highly alkaline, like limestone, but is far less porous (permeable), and much denser and harder.Marble quarries are areas of the earth that were once sea bottoms, then were exposed, through tectonic plate activity, to great heat and pressure.
This type of sedimentary rock is called a "nonconformity." It occurs when younger sedimentary layers are deposited on top of older, often deformed or eroded, igneous or metamorphic rocks. Nonconformities indicate a significant gap in the geological record due to erosion or tectonic activity.
no because sedimentary rocks are made at the bottom of oceans
First the metamorphic schist would have to become exposed through means of uplift and erosion. Subjected to weathering, rock particles will become transported by wind and water, becoming smaller and smaller until they fit the definition of sand grain size. Rivers and streams will eventually transport the tiny particles to the continental shelf where they will sink to the bottom and be covered by additional layers of sand. Because of the weight of overlying layers, the sandgrains will undergo a process known as lithification, where excess water is squeezed out and a cementing mineral solution will bind the sand grains together. At this point it can be called sandstone.
The rock layer below the bottom horizon is typically the bedrock, which is the solid, unweathered rock that makes up the Earth's crust. It is often composed of granite, basalt, or other types of igneous, metamorphic, or sedimentary rocks depending on the region's geological history.
Usually on the bottom of a body of water