Problem
1. What do you know about the following rocks and minerals: dolomite, gray wacke, flint, opal, plagioclase, smectites, and marcasite?
2. Give typical ranges of aggregate unit weights for making structural lightweight, normal-weight, or heavyweight concretes. What types of natural and synthetic aggregate sare used for making lightweight masonry blocks and insulating concrete; what types of natural minerals are useful for producing heavyweight aggregates?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.