In the 16 km. thick crust of the earth, 95% rocks are igneous and 5% sedimentary. However, 80% of the surface rocks are sedimentary and the rest are igneous.
Weathering and erosion take place on the earth's surface. This loosens the particles of the rocks and are then transported from one place to another. The particles of igneous and metamorphic rocks when transported are usually deposited in parallel layers, one upon another. The weight of upper layers on the lower layers hardens the latter. These layers hardened, stratified and consolidated are known as Sedimentary rocks.
The classification of sediment. The sediment, which forms sedimentary rocks, is divided into the following groups:-
(i) Land derived
(ii) Organic
(iii) Volcanic
(iv) Magmatic
(v) Meteoritic.
A brief description of each group throws light on the formation of rocks and their characteristics on this page: classification of sediment.
Locals hypothesize that the legacy of Italian blood and culture in Cologne, colonized by the Romans more than 1500 years ago, makes the people more jovial and lighthearted. Cologne is the largest city on the Rhine.
Kolsch is not only the dialect spoken here but, also the name of their own top-fermented beer. There are more than 4,000 pubs, restaurant's and brewery taverns in Cologne.
Unlike many of the world's large cities, Cologne, with a population of over a million, gets better every day, there are more things to do and see, more new and innovative buildings... more
Travel is an opportunity to learn, whether geography, languages, history or other subjects.
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