geomorphology & earth landforms section 8 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (b)

The Deccan Traps are a large igneous province located on the Deccan Plateau of west-central India (between 17°–24°N, 73°–74°E) and one of the largest volcanic features on Earth.

They consist of multiple layers of solidified flood basalt that together are more than 2,000 m (6,562 ft) thick and cover an area of $500000 km^2$ (193,051 sq mi) and a volume of $512000 km^3$ (123,000 cu mi).

The term “trap”, used in geology for such rock formations, is derived from the Swedish word for stairs and refers to the steplike hills forming the landscape of the region.

Answer: (c)

The Mohorovicic discontinuity usually referred to as the Moho, is the boundary between the Earth’s crust and the mantle. Named after the pioneering Croatian seismologist Andrija Mohorovicic, the Moho separates both the oceanic crust and continental crust from the underlying mantle.

The Moho mostly lies entirely within the lithosphere; only beneath mid-ocean ridges does it define the lithosphere-asthenosphere boundary.

Answer: (c)

Arkose is a detrital sedimentary rock, specifically a type of sandstone containing at least 25% feldspar.

It is commonly coarse-grained and usually either pink or grey (depending on the colour of feldspar).

Answer: (d)

Answer: (a)

The circumference of the earth at the equator is 24,901.55 miles (40,075.16 kilometres). But, if we measure the earth through the poles the circumference is a bit shorter - 24,859.82 miles (40,008 km).

Thus, the earth is a tad wider than it is tall, giving it a slight bulge at the equator. This shape is known as an ellipsoid or more properly, geoid (earth-like).