Limestone - Wikipedia

Many medieval churches and castles in Europe are made of limestone. Beer stone was a popular kind of limestone for medieval buildings in southern England.

irvmat - Portland Cement

Limestone is a sedimentary rock, ... First of all, it is a soft stone and when it is scratched with a sharp object, it becomes a white powder.

BBC - GCSE Bitesize: Uses of limestone

Uses of limestone. Limestone is a type of rock, ... Cement is made by heating powdered limestone with clay. Cement is an ingredient in mortar and concrete:

Chalk - Wikipedia

Most cliffs of chalk have very few obvious bedding planes unlike most thick sequences of limestone such as the ... which was originally made of mineral chalk, ...

Made of Limestone

Gargano, Puglia, Italia. Un documentario su andar via o rimanere nel luogo in cui si è nati.

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