geomorphology & earth landforms section 7 MCQ Questions & Answers Detailed Explanation

Answer: (a)

Answer: (c)

Answer: (c)

Chevron is an angular fold with straight limb and small hinges.

Answer: (b)

Because the density of pure ice is about 920 kg/ m³, and that of sea water about 1025 kg/m³, typically only one-ninth of the volume of an iceberg is above water.

Answer: (a)

Dendritic drainage systems are the most common form of the drainage system. The term Dendritic comes from the Latin word 'dendron', meaning tree, due to the resemblance of the system to a tree.

In a dendritic system there is one main river (like the trunk of a tree), which is joined and formed by many smaller tributary rivers.

Dendritic systems form in V-shaped valleys; as a result, the rock types must be impervious and non-porous.

Answer: (d)

The schists constitute a group of medium-grade metamorphic rocks, chiefly notable for the preponderance of lamellar minerals such as micas, chlorite, talc, hornblende, graphite, and others. Gneissic rocks are usually medium- to coarse-foliated and largely recrystallized but do not carry large quantities of micas, chlorite or other platy minerals.

Mica minerals make some rocks sparkle! They are often found in igneous rocks such as granite and metamorphic rocks such as schist. Most schists are mica schists, but graphite and chlorite schists are also common.

Schist is a crystalline metamorphic rock, mostly composed of more than 50% tabular and elongated minerals.