slate as a roofing material
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Title: slate as a roofing material

Essay Details:

Subject: Technology
Date: August 21, 2015
Level: University
Grade: A
Length: 7 / 1860

Essay text:

When slate forms, tremendous temperatures and pressures cause the mineral grains to align so that they are parallel to each other. This granular alignment is referred to as cleavage. This cleavage enables quarry workers to split out the thin, flat sheets of stone we see on slate roofs (see Figure 1). Different slates vary in their composition, structure, and durability. Since slate is a natural material, derived from different types of mineral deposits, slate is neither uniform nor consistent. Figure 1. Splitting slate. History of Slate There is evidence to show that slate roofing was used prior to the Revolution...

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