sedimentary and metamorphic rocks come from where?

Answer 1

Sedimentary rocks are formed of organic and inorganic material laid down, e.g limestone.
Metamorphic rocks are any rocks that have been chemically or structurally changes as a result of pressure or temperature, e.g slate

Answer 2

Sedimentary rocks form from sediments, or layers of sand, silt and dirt that collect on the bottom of oceans, seas and lakes. Two processes help cement the particles in the sediments together. New layers of sediment compress the older layers of sediment by their wieght. Also, minerals from the surrounding water will crystalize around the grains of sand and silt forming them into a solid mass.

Metamorphic rocks are created through heat, though not from being melted. Melting makes a third type of rock called igneous. Heat from the inside of the earth causes some rocks to undergo chemical reactions. For example, if the sedimentary rocks from the ocean floor subduct, or get pushed down under one of earth's tectonic plates, they will be subjected to lot's of heat and pressure. This heat and pressure will change the sedimentary rock to a metamorphic rock.

Answer 3

Sedimentary rock is formed from dead fish and sea animals and other things that go to the bottom of the sea.

Metamorphic rock is rocks that are changed by heat and pressure.

Answer 4

Types of Rocks
Geologists classify rocks in three groups, according to the major Earth processes that formed them. The three rock groups are igneous, sedimentary, and metamorphic rocks.
Igneous rocks are formed from melted rock that has cooled and solidified. When rocks are buried deep within the Earth, they melt because of the high pressure and temperature; the molten rock (called magma) can then flow upward or even be erupted from a volcano onto the Earth's surface. When magma cools slowly, usually at depths of thousands of feet, crystals grow from the molten liquid, and a coarse-grained rock forms. When magma cools rapidly, usually at or near the Earth's surface, the crystals are extremely small, and a fine-grained rock results. A wide variety of rocks are formed by different cooling rates and different chemical compositions of the original magma. Obsidian (volcanic glass), granite, basalt, and andesite porphyry are four of the many types of igneous rock.

Sedimentary rocks are formed at the surface of the Earth, either in water or on land. They are layered accumulations of sediments-fragments of rocks, minerals, or animal or plant material. Temperatures and pressures are low at the Earth's surface, and sedimentary rocks show this fact by their appearance and the minerals they contain. Most sedimentary rocks become cemented together by minerals and chemicals or are held together by electrical attraction; some, however, remain loose and unconsolidated. The layers are normally parallel or nearly parallel to the Earth's surface; if they are at high angles to the surface or are twisted or broken, some kind of Earth movement has occurred since the rock was formed. Sedimentary rocks are forming around us all the time. Sand and gravel on beaches or in river bars look like the sandstone and conglomerate they will become. Compacted and dried mud flats harden into shale. Scuba divers who have seen mud and shells settling on the floors of lagoons find it easy to understand how sedimentary rocks form.

Sometimes sedimentary and igneous rocks are subjected to pressures so intense or heat so high that they are completely changed. They become metamorphic rocks, which form while deeply buried within the Earth's crust. The process of metamorphism does not melt the rocks, but instead transforms them into denser, more compact rocks. New minerals are created either by rearrangement of mineral components or by reactions with fluids that enter the rocks. Some kinds of metamorphic rocks--granite gneiss and biotite schist are two examples--are strongly banded or foliated. (Foliated means the parallel arrangement of certain mineral grains that gives the rock a striped appearance.) Pressure or temperature can even change previously metamorphosed rocks into new types.

Answer 5

- Sedimentary: come from sediments, debries and parts of other rocks that accumulate in river ends for instance.

- Metamorphic: Come from other rocks that are extremely heated and melted in the Earth's womb. Once they are expelled to the surface (eg: by a volcano) they get solid.