One of the silent films made by Eastman Kodak in the 1920s for classroom use, “Limestone and Marble” examines both of these stones. At :36 a limestone quarry is shown, with the limestone originating from “an old coral reef”. At :50, chipped limestone is shown being stored for use in road building. At 1:17 an early dump truck drops a load of rock into a crusher and it emerges in small pieces (2:00). At 2:08 it is dumped to form a roadbed. At 2:16 chalk, a form of limestone, is discussed. A classroom scene follows. At 4:00 granular limestone is shown being shaped through various processes including sawing and chiseling. At 5:13 an intricate pattern is cut into the stone. At 5:30 the bottom of a column is polished to make it even. At 5:53 a steam train pulls finished marble columns into a storage area where they are loaded by steamshovel (6:18). At 7:19 a stone window is put in place at a church. At 7:40 limestone is burned to create lime, one of the important ingredients for cement (9;42). The lime plant belches smoke at 8:50. At 11:00 bags of cement are seen being filled. At 11:30 marble, a form of limestone, is shown being cut out of a quarry. At 12:50 marble is polished using what appears to be a steel plate held down with weights. It can be used for making sculptures or for buildings such as the Lincoln Memorial as seen at 14:08.
Limestone is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs. Its major materials are the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3).
About 10% of sedimentary rocks are limestones. The solubility of limestone in water and weak acid solutions leads to karst landscapes, in which water erodes the limestone over thousands to millions of years. Most cave systems are through limestone bedrock.
Limestone has numerous uses: as a building material, an essential component of concrete (Portland cement), as aggregate for the base of roads, as white pigment or filler in products such as toothpaste or paints, as a chemical feedstock for the production of lime, as a soil conditioner, or as a popular decorative addition to rock gardens
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This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com
