Hydraulic fracturing and horizontal drilling have increased dramatically in Pennsylvania Marcellus shale formations. however the potential for major environmental impacts are still incompletely understood. High-throughput sequencing of the 16S rRNA gene was performed to characterize the microbial community structure of water. sediment. https://www.roneverhart.com/Corvette-Leather-Seat-Covers-Graphite-Standard-1984-1987/