Photomicrograph of a volcanic lithic fragment (sand grain); upper picture is plane-polarized light, bottom picture is cross-polarized light, scale box at left-center is 0.25 millimeter. Volcanic rocks are usually fine-grained or aphanitic to glass in texture. They often contain clasts of other rocks and phenocrysts.
I paid almost $13,000 to have Duration Premium shingles installed on my central Florida home in late 2007. I went with Owens Corning Duration Premium shingles because of their premium quality, their lifetime warranty and their high wind resistance. Within 3 months of the installation, I started having leaks.
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