What does pressure make rocks become?

Answer 1

Answer The atoms in rocks rearrange to form denser minerals. The combination of heat and pressure may cause the minerals in the rock to separate into layers.

Answer Pressure squeezes out any remaining water that may be left in the metamorphic rock and minerals that have water as part of their structure are changed chemically to minerals that do not require water as part of their structure. The metamorphic rock will then have become a higher grade metamorphic rock possibly containing garnet, a non-hydrous mineral.

Answer 2

Water and ice are agents in the processes of weathering and erosion; breaking apart rocks of all types into smaller pieces and transporting them to a place of deposition, where they can lithify into new sedimentary rock when water is squeezed out during compaction and cementation.

Removal of water by heat and pressure can create metamorphism of rock when hydrous minerals are replaced with non-hydrous minerals.

Answer 3

yes! It affects rocks by breaking them. These rocks of course are under a lot of stress when being smashed by something and when pressure comings onto them it cracks them and they then break.

Yes it has a tremendous effect on rocks but mainly the pore system of the rock. As the pressure increases the void space in the rock (porosity) will decrease, by decreasing the porosity, the pressure can potentially decreases the connectedness of the pores (permeability), permeability defines how well a fluid can flow through the pores. If the pressure increases then the decreasing porosity will increase the water (brine) saturation, this comes from archie's law and the Resistivity index. If the saturation of the brine increases with pressure then the wettability changes to more water-wet, this is no good! So basically if we don't take into account pressure affects on a rock or only look at the macroscopic affects and not the microscopic affects, then we ruin any chance of retrieving oil and could damage the well formation for good and sometimes even hurt people. One last thing, N=Ah(Phi)(1-Sw)R...A is the area, h is the height, Phi is porosity, Sw is water saturation, and N is million bbl of oil. If we do not look at pressure affects, we get a very unreliable number for N, which means we drill and find nothing or we decide not to drill and pass on a great well. Things get more complex when you through shale into the mix and how their properties vary with pressure because shale properties really start making things messy, Google Simandoux equation or Laminated Shale model equation, to get an idea of we deal with. Not simple to say pressure breaks rocks.

Pressure can compress rocks and indeed reduce any porosity they had (not all rocks are porous) but the bigger effects are on the formations as a whole, by folding and faulting. Many rocks will bend very slightly, then fracture by tension on the outside of the bend, as folding intensifies. A fault is also a fracture, but of shear form.

Answer 4

In the Rock Cycle, heat and pressure helps the igneous rock to form a metamorphic rock which forms back into an igneous rock. The sedimentary rock is helped through heat and pressure to form a metamorphic rock.

Answer 5

surprisingly most of the time it stays the same, but if the pressure is continuous, it has a high percentage of braking. that type of boundary is called convergent boundary. that is when plate tectonics (NOT ROCKS) collide.

Answer 6

Pressure makes rocks become metamorphosed.

Answer 7

it makes brocoli