Geography Topics
Undergraduate level — Geography
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Earth Basics
Maps, Latitude & Longitude
Geomorphology
Climatology
Oceanography
Biogeography
Human Geography
Economic Geography
Environment Geography
Advanced Theories and Models
Physical Geography
Indian Geography
World Geography
Geography of Bihar
Climate & Environment
quiz Questions
Q71
What physical parameter dictates whether an alluvial river channel will exhibit a meandering or braided pattern, according to Lane’s Balance relation?
The low ratio of clay to gravel in the suspended load
High sediment load combined with a steep channel gradient
Deep laminar fluid flows within cohesive channel banks
Low stream power under highly consolidated bedrock
Explanation
Braided streams develop under high sediment supply rates and steep stream slopes, combined with loose, easily erodible channel banks.
Q72
Which type of micro-fault configuration describes a low-angle thrust fault where the overriding block travels massive horizontal distances over tens of kilometers?
Strike-slip pull-apart fault
Nappe structure
Listric normal fault
Reverse strike fault
Explanation
A nappe is a sheet-like body of rock that has been moved more than 2 km from its original position by thrust faulting or recumbent folding.
Q73
What type of eolian sand dune exhibits a crescent shape with the horns pointing downwind, developing in areas with a unidirectional wind field and a limited sand supply?
Parabolic dune
Barchan dune
Seif dune
Star dune
Explanation
Barchan dunes are crescent-shaped dunes whose tips point downwind, forming under restricted sand volumes and stable wind directions.
Q74
Which marine geomorphic feature represents a flat-topped submerged volcanic seamount that has undergone wave-cut planation and subsequent thermal subsidence?
Abyssal hill
Guyot
Mid-oceanic knoll
Submarine canyon head
Explanation
Guyots are flat-topped seamounts that were once above sea level, eroded flat by wave action, and submerged due to seafloor spreading cooling.
Q75
What geomorphic index is calculated by comparing the actual channel length along its thalweg to the straight-line valley length to classify channel patterns?
Bifurcation ratio
Sinuosity index
Hypsometric integral
Drainage density value
Explanation
Sinuosity is the ratio of channel length to straight-line valley length. A value greater than 1.5 generally denotes a meandering river.
Q76
Which subaerial process drives the chemical weathering of potassium feldspars into kaolinite clay minerals under weakly acidic meteoric water conditions?
Carbonation leaching
Hydrolysis
Hydration crystallization
Chelation bonding
Explanation
Hydrolysis involves a chemical reaction between H+ ions in water and mineral ions, replacing cations in feldspar to form kaolinite clay.
Q77
What specific term describes a valley whose course was established on a younger overlying geological stratum that has since been entirely eroded, forcing the stream to cut blindly across ancient underlying structures?
Antecedent valley
Superimposed valley
Consequent stream channel
Subsequent strike stream
Explanation
A superimposed drainage pattern develops on younger covering strata that are subsequently stripped away by erosion, exposing discordant rock structures beneath.
Q78
Which marine shoreline feature is a linear depositional ridge of sand that connects an offshore island directly to the mainland shore?
Spit
Tombolo
Barrier beach
Baymouth bar
Explanation
A tombolo is a sand deposition bar or spit that links an offshore island to the adjacent mainland coast.
Q79
According to Plate Tectonics theory, what morpho-tectonic phase of the Wilson Cycle is represented by the modern Red Sea?
Embryonic rift valley phase
Juvenile ocean basin phase
Mature ocean basin phase
Terminal geosynclinal phase
Explanation
The Red Sea represents the juvenile or narrow sea stage of the Wilson Cycle, where continental rifting has transitioned into initial seafloor spreading.
Q80
Which structural parameter describes the geometric intersection line between a tilted fault or bedding plane and a horizontal reference plane?
Dip angle
Strike line
Hade angle
Plunge bearing
Explanation
The strike of a geologic feature is the compass orientation of a horizontal line drawn on its dipping plane surface. Dip is perpendicular to strike.