Geology - 2015 Past Year Paper - IIT JAM

A sandstone with less than 15% matrix content is known as:

Which of the following mineral deposit is formed exclusively by surface geological processes?

Graphic texture is indicative of:

Which of the following is NOT a form of the isometric system ?

Which of the following group of fossils became extinct at the Permo- Triassic boundary?

Arrange the following granitoid bodies in order of their decreasing age.

(P) Erinpura Granite (Q) Closepet Granite (R) Singhbhum Granite (S) Ladakh Granitoids

Which of the following Brachiopod genera is considered as “living fossil” ?

In the given figure (i), (ii), (iii), and (iv) denote the plate tectonic settings: Mid Oceanic Ridge (M), Island Arc (I), Continental Arc (C) and Rift Zone (R).

Which one of the following options is correctly matched?

In an undulated topography, a set of uniformly inclined beds show ‘V’-shaped outcrop pattern with apex pointing downstream in a valley. This indicates:

Silica- rich viscous magmas often produce:

Identify the faults in the diagrams (i), (ii), and (iii)

A mine excavation made along the strike of a 2 meter thick tabular ore body dipping 30° is called:

An ore body showing ‘saddle reef’ structure is formed by:

In the given block diagram, select the most suitable site amongst (i), (ii), (iii), and (iv) for constructing a tunnel.

Match the metals listed in Group- I with their ores in Group- II.

Which one of the following minerals is correctly matched with its optical property?

The mineral coesite is expected to be stable in which of the following metamorphic facies?

In the given phase diagram, the sequence of minerals crystallizing from a magma of composition “X” under equilibrium conditions is:

In the given stereo plot, poles to three bedding planes are plotted as points (i), (ii) and (iii). Find the correct order of increasing dips of the beds.

Size of a kettle lake depends upon :

Match the sedimentary rocks given in Group- I with their characteristics in Group- II

Arrange the following formations of the Gondwana Supergroup in order of their decreasing age: (i) Raniganj Formation (ii) Barakar Formation (iii) Kulti Formation (iv) Karharbari Formation

Match the Lamellibranchia genera in Group- I with their dentition pattern in Group- II

Drainage density of a basin is defined as:

S- wave is terminated at:

Arrange the elements Fe, O, H, He, Si in decreasing order of their abundance in the solar system.

A dolerite dyke metamorphosed under amphibolite facies condition is expected to have the mineral assemblage:

A pyrite- chalcopyrite- bearing copper ore body has undergone supergene enrichment. Choose the correct statement(s).

The geochemical trends illustrated in the diagrams for a suite of cogenetic and coeval igneous rocks indicate :

Which of the following chronostratigraphic unit(s) is/are correctly matched with the corresponding geochronologic unit(s) ?

Which of the following statements related to depositional environments is/are correct ?

W hich of the following fossil genera is/are invertebrate ?

Which of the following trilobites have two to four thoracic segments and are eyeless?

Which of the following formation(s) was/were deposited in glacial and/or fluvial environment?

Which of the following statements is/are correct?

Which of the following stratigraphic units are correctly matched with their ages and geographical localities?

Petroleum producing basins of India belong to:

On a toposheet of 1:50,000 scale, the distance between upper and lower traces of a bed is 5 cm. The actual distance on ground in kilometers is_________.

On a flat topography the outcrop width of a bed is 30m. If the true dip of the bed is 30°, the actual thickness of the bed in meters is_________.

In the given map, the true dip (in degree) of the bedding plane X- Y is_________.

In the given diagram, the percentage of Plagioclase in a rock of composition ‘X’ is_________.

The birefringence of a uniaxial mineral having refractive indices of 1.658 and 1.486 is_________.

In the given stereoplot, the plunge amount of the fold axis is_________.

A crystal face has the following intercepts for the crystallographic axes: 1a₁, 1a₂, ½a₃, ∞c. The Miller- Bravais indices for the face is_________.

Total number of mirror planes in the    point group is_________. 

A radioactive isotope has 1024 atoms. How many atoms will remain after 4 half- lives?

Waste water discharged from a coal mine has hydrogen ion [H+] concentration of 10^–6 moles/liter. The pH of the water is_________.

An ore body is dipping 30° towards west on a flat topography. At what distance (in meters) should a borehole be placed so that it intersects the ore body perpendicularly at a vertical depth of 70 meters ?

Using the phase rule, the maximum number of phases in a 3 (three) component geological system having 1 (one) degree of freedom is_________.

The lithostatic pressure in Mega Pascal (MPa) at a depth of 10 km in a granite batholith having density 2700 kg/m³ is_________. (Acceleration due to gravity = 9.8 m/s²)

In the given phase diagram, the weight percent of melt at point ‘M’ for a crystallizing magma of bulk composition ‘X’ is_________.

Calculate the average atomic weight (answer to be given up to 3 decimal places) of Rubidium using the given data.

In an oblique slip fault having 30° dip, the net slip is 10 meters at an angle of 45° to the strike of the fault plane. The dip slip component of the fault in meters is_________. (Answer to be given up to 2 decimal places).

A 10 cm³ sandstone block has a mass of 20 grams. If the average density of sand grains is 2.5 g/cm³, the porosity (in percent) of the sandstone is________.

A mineral has a weight of 4.5 grams in air and 3.2 grams in water. Assuming density of water to be 1g/cm³, the specific gravity (up to 2 decimal places) of the mineral is_________.

The duration of the Proterozoic Eon in Ma is_________.

From the given equation, calculate how many moles of magnetite will be produced by the reduction of 1 (one) mole of hematite (answer to be given up to 3 decimal places). .