What is geology and relief?
Discovering Geology — Geological processes. ‘Relief’ is the term used for the differences in height from place to place on the land’s surface and it is greatly affected by the underlying geology. Relief relies on the hardness, permeability and structure of a rock.
Which of the following rock shows schistose structure Mcq?
Rocks like crush breccia, mylonite and slate show this type of structure. Explanation: The rock with schistose structure is made up of broadly parallel or sub-parallel layers or bands of flaky, platy or rod-like minerals making it very weak in the direction of parallelism.
What will happen if the temperature pressure conditions exceeds the requirement for metamorphism?
Metamorphism occurs when there is an increase in temperature and pressure which results to melting of rocks. What will happen if the the temperature-pressure conditions exceeds the requirement for metamorphism? Rocks will melt and form igneous rocks. Rock will be changed into another metamorphic rock.
What must happen within a magma chamber for fractional crystallization to take place?
This process is called fractional crystallization. The formation of olivine removes iron- and magnesium-rich components, leaving the overall composition of the magma near the top of the magma chamber more felsic. The crystals that settle might either form an olivine-rich layer near the bottom of the magma chamber.
What is the meaning of relief in geography?
Relief is typically defined as the difference in height between the high point and the low point on a landscape, in feet or in meters. It is called a “relief-like” map, since it uses various colors and shading to shows areas of different elevation, and some shadowing to highlight steep slopes.
What is the relief feature?
Answer: The characteristics that are related to the landscape of specific areas are known as relief features. They are not anything like the pattern of drainage that involves water channels.
What is Maculose structure?
Maculose structure is characterized by a spotted appearance of the rock that may be caused due to the formation of large-sized crystals called porphyroblasts within an otherwise fine grained rock as a result of thermal metamorphism of argillaceous rocks like shale.
What is the use of quartzite rock?
Pure quartzites are a source of silica for metallurgical purposes and for the manufacture of silica brick. Quartzite is also quarried for paving blocks, riprap, road metal (crushed stone), railroad ballast, and roofing granules.
What type of metamorphism is caused by high temperature and high pressure?
Regional Metamorphism
Regional Metamorphism (Fig. 8.3): When temperatures and pressures increase beyond the range of burial metamorphism, regional metamorphism takes over. Regional metamorphism takes place under high temperature and pressure conditions that may extend over large areas.
What happens to the rock pressure?
In order to create metamorphic rock, it is vital that the existing rock remain solid and not melt. If there is too much heat or pressure, the rock will melt and become magma. This will result in the formation of an igneous rock, not a metamorphic rock.
What is Bowen’s reaction series and how does it describe magma crystallization?
Bowen’s Reaction Series describes the temperature at which minerals crystallize when cooled, or melt when heated. The values will be different for minerals located deep below the Earth’s surface due to the increased pressure, which affects crystallization and melting temperatures (see Chapter 4.4).
What is the last mineral to crystallize in Bowen’s reaction?
According to the Bowen’s reaction series, mafic minerals (1) will crystallize early, followed by the more felsic minerals potassium feldspar (4), muscovite (3), and lastly quartz (1).