How do metamorphic rocks form differently from sedimentary rocks?

Answer 1

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.

Answer 2

Metamorphic rock CAN contain fossils, but since these rocks form under intense heat and pressure where stone flows something like taffy, the fossils will be highly degraded and distorted.

Sedimentary rock forms when layers of silt are deposited on the bottom of a body of water. When conditions are right, layers form quickly and are not disturbed and little oxygen is present, dead creatures that fall on that bottom can become entombed in preserved at the layers are increasingly compressed, eventually cementing into rock.

Answer 3

too be quite honest i don't really know so that is why i am on answers.com so that hopefully someone will read this message and tell me what the answer is I'm not being desperate or anything because homework is stupid but PLEASEEE HELP ME!!

Answer 4

Metamorphic rock has been subjected to heat and pressure which causes changes in its physical and/or chemical properties. Sedimentary rock is largely unchanged from the state in which it was laid down originally. For example, limestone is a sedimentary rock while marble is a metamorphic rock formed from limestone that has been subjected to heat and pressure to change its crystal structure.

Answer 5

Sedimentary rocks form from layers of sand, silt or clay, sometimes mixed with pebbles, and the bodies of living things (that may the be fossilised) The rocks are often quite soft.

Metamorphic rocks form when rocks (usually sedimentary rocks) are subjected to extreme heat and/or pressure, usually deep underground.

The rocks are changed in form, often becoming harder. Fossils are usually destroyed by the process.

Answer 6

Harder, in most cases, due to their interlocking crystalline texture.

Answer 7

heat and pressure cause them to densify

Answer 8

uh, i think you mean 'metamorphic'....