Solution:
Due to accumulation of sediments in a geosyncline fold mountains have enormous thickness of sedimentary rocks. The plains were folded into mountains and The sediments were folded into recumbent and nappe.

Solution:
Crater is the cup shaped mouth of volcanoes. Whenever any volcano erupts material from the top of the cone is blown off or collapses into vent which widens the vent and this widened vent is called crater or caldera.

Solution:
Dogger bank, rockfall bank, wales bank and sand bank are located in North East Atlantic. Dogger Bank, extensive isolated shoal in the North Sea, lying about 60 miles (100 km) off the northeastern coast of England. Rockall is an uninhabitable granite islet located within the exclusive economic zone of the United Kingdom, situated in the North Atlantic Ocean and is claimed by the United Kingdom as its territory. Wales is bordered by England to the east and by sea in all other directions: the Irish Sea to the north and west, St George's Channel and the Celtic Sea to the southwest and the Bristol Channel to the south.

Solution:
Formation of magma along the bedding plane results in Sill. Sills result when an intrusion of magma is made horizontally along the bedding planes of sedimentary while dyke is formed through vertical intrusion of magma.

Solution:
Schist and gneiss are produced by medium to high grade metamorphism. In some cases gneisses are produced by higher grade metamorphism than schists. Low-grade metamorphic rocks tend to be fine-grained (the newly formed metamorphic mineral grains that is). High-grade metamorphic rocks tend to be coarse-grained.

Solution:
Rome is called as the eternal city because this city had long and influential art, architecture and culture which Roman people thought would last forever.

Solution:
The statements that are correct are The acid lava usually melts at a relatively higher temperature as compared to basic (basaltic) lava and The acid lava solidifies into glass-like sheets and the basaltic lava solidifies into rough surfaces.