geomorphology & earth landforms section 6 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (d)

Fossils are found only in the sedimentary rocks or the metamorphic rocks made from the sedimentaries. Granite is an igneous rock and hence contains no fossils.

Answer: (b)

1. Granite is a common type of intrusive, felsic, igneous rock that is granular and phaneritic in texture. This rock consists mainly of quartz, mica, and feldspar.
2. Sedimentary rocks are formed by burial, compression and chemical modification of deposited weathered rock debris or sediments at the Earth’s surface. Clay and sandstone are examples of sedimentary rocks.
3. Metamorphic rocks have been modified by heat, pressure and chemical process usually while buried deep below Earth’s surface. Exposure to these extreme conditions has altered the mineralogy, texture and chemical composition of the rocks. Slate is an example of metamorphic rock.

Answer: (c)

Composite volcanoes are made from alternate layers of lava flows and exploded rock made of magma ranging from basalt to granite about 100 to 3,500 m tall.

The essential feature of a composite volcano is a conduit system through which magma from a reservoir deep in the earth’s crust rises to the surface.

The volcano is built up by the accumulation of material erupted through the conduit and increases in size as lava, cinders, ash etc. are added to its slopes.

Answer: (c)

Answer: (c)

1. Basalt is having 45%-52%
2. Granite is having 69%-77%
3. Andesite is having 57%-63%
4. Rhyolite is having 69%-75% of silica conflict respectively.